As an Amazon Associate, I earn from qualifying purchases with no additional costs for you.
This guide covers the best rockhounding sites in Colorado, the 22 rocks and minerals you are most likely to find, and the land rules that decide where you can dig.
The key legal fact: BLM land and most national forest land are open to hand collecting in personal-use amounts. Colorado state parks, national parks and monuments, wilderness areas and city or county open space are off-limits, and much of the best mining ground is private or under claim.
Start with Mount Antero for aquamarine, Devils Head and the Pikes Peak granite country for smoky quartz and amazonite, and St. Peters Dome for zircon. The high gem fields are snow-free only in midsummer, and the Florissant Fossil Quarry is closed for the 2026 season.
Rockhounding Regulations & Laws in Colorado
Colorado is welcoming to rockhounds, but it is also a patchwork of public land, active mining claims, private ranches and protected areas. Knowing who manages the ground matters more here than in most states.
- BLM land: mineral specimens, gemstones, petrified wood and common invertebrate and plant fossils may be collected without a permit, in reasonable amounts, for personal use only and with hand tools. Decorative rock is limited to what fits in a 5-gallon container per person per day (BLM Colorado rockhounding guide).
- Petrified wood on BLM land is limited to 25 lb plus one piece per day and 250 lb per calendar year, and you may not pool limits to take a larger piece.
- Vertebrate fossils, such as dinosaurs, mammals and fish, need a special collecting permit. Archaeological artifacts, including arrowheads and old bottles, must stay where you find them.
- National forests: collecting small quantities of rocks, gems and minerals for personal use and gold panning with hand tools need no permit. The Pike-San Isabel National Forests ask for a free-use permit for petrified wood and warn that wilderness areas, Wild and Scenic River corridors, campgrounds, historic sites and areas withdrawn from mineral entry, such as Pikes Peak, may be closed even to hobby collecting (Pike-San Isabel NF rockhounding brochure).
- State parks: Colorado Parks and Wildlife rules forbid removing any object of geological, historical or natural value from state parks and outdoor recreation lands. The only exception is recreational gold panning in the Arkansas Headwaters Recreation Area, where signs do not prohibit it (2 CCR 405-1, #100).
- Off-limits: Rocky Mountain National Park, Florissant Fossil Beds and other national park units, the Browns Canyon and Camp Hale – Continental Divide national monuments, city and county parks and open space, and fossils anywhere in the McInnis Canyons National Conservation Area (BLM McInnis Canyons).
- Mining claims and private land: the gem fields of Mount Antero, Mount White and the Pikes Peak region are dotted with active claims, and many historic mines, including the Sedalia Mine, sit on private land. Collect there only with the claimant’s or owner’s permission.
Rules change, and every field office or ranger district can add its own closures. Call the local office before a long trip, especially for wilderness areas and mining districts.
Use this guide as a starting point, not a final authority. Follow posted signage, and always get the landowner’s permission before collecting on private property.
Access rules and land ownership change over time, so confirming that collecting is currently allowed — and whether a permit is required — is your responsibility. Where coordinates are listed, treat them as a general reference only. How to Find Rocks is not responsible for the accuracy of the information here or for any outcome resulting from its use.
Best Rockhounding Sites in Colorado
Colorado’s mineral wealth comes from the Pikes Peak granite, the pegmatites of the Sawatch Range and a long history of hard-rock mining. These ten sites give the best mix of access and reliable finds.
The map below plots every site from the tables in this guide. Tap a point to see what you can find there and to start navigation.
The table lists each site, whether it is public land or private, and its coordinates. Trout Creek Pass and the Florissant Fossil Quarry have no verified point, so they are described below the table.
| Site | Access | GPS Coordinates |
|---|---|---|
| Mount Antero (San Isabel National Forest — many mining claims) | Public | 38.673594, -106.246717 |
| Devils Head (Pike National Forest) | Public | 39.259968, -105.100757 |
| St. Peters Dome (Pike National Forest) | Public | 38.747128, -104.911597 |
| Stove Mountain (Pike National Forest) | Public | 38.77611, -104.90083 |
| Unaweep Canyon (BLM) | Public | 38.85354, -108.55445 |
| Trout Creek Pass (BLM and national forest — check land status) | Public | — |
| Wolf Creek Pass (San Juan National Forest) | Public | 37.482293, -106.802337 |
| Turret Mining District (general area — private claims) | Private | 38.64, -105.99 |
| Last Chance Mine, Creede (private mine — fee) | Private | 37.884018, -106.936668 |
| Florissant Fossil Quarry (private quarry — fee; closed for 2026) | Private | — |
Mount Antero
Mount Antero in the Sawatch Range is the highest known gem locality in the United States, and its gem deposits all lie above timberline. It is best known for aquamarine, with fluorite and apatite as common finds and beryl, smoky quartz, topaz, phenakite and bertrandite as occasional ones.
Heavy snow means the mountain is usually workable only from June to early September. The access road is steep, rocky and narrow, so a high-clearance four-wheel-drive vehicle is essential, and afternoon lightning is a real danger.
The talus slopes are the place to start. Much of the mountain and neighboring Mount White is covered by active claims, so check claim status and stay off posted ground.
About two miles southwest of the summit, the California Mine at roughly 12,500 feet sits near the head of Browns Creek, below the saddle between Mount Antero and Mount White. Its tunnel is a patented claim and is off-limits, but the Upper Browns Creek area around it has produced aquamarine, fluorite, biotite, quartz, brannerite, molybdenite and rare topaz.
Chalk Creek, which drains the south side of the mountain, is also listed in our sources, but without a usable location, so check claims and land status before you explore it.
Devils Head
Devils Head, about 33 miles south-southwest of Denver, is one of the classic Pikes Peak granite localities. It is known for large smoky quartz crystals and paler amazonite.
The area lies in the Pike National Forest. Collect only small amounts by hand, keep away from the campground and the fire lookout trail, and fill in any holes you dig.
St. Peters Dome
St. Peters Dome, west of Colorado Springs, sits at the southern end of the Gold Camp Road collecting area. It is famous for zircon, which here forms some of the largest and most colorful crystals in the Pikes Peak region.
The dome is on Pike National Forest land and is reached from Gold Camp Road. The nearby Eureka Tunnel area and the old mine dumps west of the road also produce zircon, but their land status is not recorded as public, so ask before you collect there.
Stove Mountain
Stove Mountain, also called Cookstove Mountain, rises above Colorado Springs in the Pike National Forest. It was popular with prospectors in the 19th century, and galena (lead ore) and a little silver still turn up today.
Fluorite, galena and quartz are common here, while amazonite and smoky quartz are occasional finds and topaz is rare.
Unaweep Canyon
Unaweep Canyon in Mesa County is a geological oddity: two creeks, East Creek and West Creek, flow out of opposite ends of the canyon from a low divide in the middle. Its cliffs expose ancient Precambrian igneous and metamorphic rocks.
The cliffs and creeks are good hunting ground on BLM land. Calcite and hematite are common, and amethyst, fluorite and limonite are occasional finds.
Trout Creek Pass
The pegmatites around Trout Creek Pass, on the road between Buena Vista and the South Park basin, produce quartz, rose quartz, pink feldspar and biotite and muscovite mica. Green fluorite, garnet and fossils from the sedimentary layers are occasional finds.
The south and east slopes of the pass are the best places to look. The coordinates in our original source did not match the pass, so we list no point; land along the highway is a mix of BLM, national forest and private ground.
Wolf Creek Pass
Wolf Creek Pass on US 160 crosses the San Juan Mountains through the San Juan National Forest. The slopes and gravels around the pass produce agate, jasper and chalcedony.
The Wolf Creek streambed just west of the pass is a second stop, with agate, jasper, chalcedony, quartz and occasional amethyst and geodes.
Turret Mining District
The Turret Mining District, about ten miles north of Salida, is a group of adjoining sites around the ghost town of Turret, several old gold mines and the Calumet iron mine. Muscovite, garnet, jasper, quartz and hematite are common, and epidote, beryl and corundum are occasional finds.
Most of the district is private property and mining claims, including the Calumet Mine. Get the owner’s permission before you collect, which is why the table gives only a general-area point.
Last Chance Mine
The Last Chance Mine above Creede is a historic private mine that opens seasonally for rock and mineral collecting. Its jewelry shop uses amethyst, agate and turquoise from the mine.
Jasper, galena, copper minerals, turquoise, agate and rhodonite have been reported here. Collecting is on the owner’s terms, so check the current fee and season before you go.
Florissant Fossil Quarry
The Florissant Fossil Quarry lets visitors split their own blocks of the Florissant Formation, an easy-to-split shale with late Eocene insects, fish, small animals and plants about 34 million years old. Visitors keep what they find.
The quarry is closed for the 2026 season and plans to reopen in spring 2027. When open, it charges $20 per collector per hour in cash and provides tools and instruction, and groups of 10 or more should book ahead.
Do not confuse it with the neighboring Florissant Fossil Beds National Monument, where collecting is prohibited.
Other Notable Rockhounding Spots in Colorado
Beyond the headline sites, good material is spread across the state. These spots are grouped by land type so you can add a few stops to a trip.
Public Sites
These sites are on national forest or BLM land, where hand collecting in personal-use amounts is allowed.
| Site | GPS Coordinates | Common Rocks & Minerals |
|---|---|---|
| Wigwam Creek, west of Sugarloaf Peak (Pike National Forest) | 39.248687, -105.3387 | Amazonite, fluorite, quartz, smoky quartz |
| Sentinel Rock (Pike National Forest) | 38.80464, -104.91777 | Amazonite, quartz, hematite, goethite, fluorite |
| Cement Creek (Gunnison National Forest) | 38.931201, -106.769938 | Garnet, epidote, magnetite, albite, ankerite, chlorite, talc |
| Wolf Creek streambed (San Juan National Forest) | 37.487272, -106.820292 | Agate, jasper, chalcedony, quartz, amethyst, geodes |
| Pine Creek (Pike National Forest) | 39.325352, -105.114078 | Amazonite |
| Long Hollow (Pike National Forest) | 39.182124, -105.134414 | Topaz |
| Mount White (San Isabel National Forest — many mining claims) | 38.656264, -106.223035 | Aquamarine |
| Mount Princeton (San Isabel National Forest) | 38.748971, -106.242564 | Aquamarine |
| Eureka ghost town (BLM) | 37.873606, -107.563271 | Rhodochrosite |
| Willis Gulch (San Isabel National Forest) | 39.066258, -106.390303 | Rhodochrosite |
Crystal Peak in Teller County, between Florissant and Lake George, is one of the most famous amazonite and smoky quartz localities in the state. Its eastern side is private housing, while the western and northern parts are national forest, so check the land before you dig.
Agate also comes from the Del Norte area in Saguache County, from Feltch Creek in Fremont County and from the South Platte River, where many banks belong to Denver Water. In Rabbit Valley, inside the McInnis Canyons National Conservation Area, fossil collecting is banned, so ask the BLM office about rocks before you collect.
Bear Creek west of Denver has been worked since the gold rush of the mid-1800s and is listed for fluorite, quartz, amazonite and smoky quartz. Much of the canyon runs through Denver Mountain Parks and other protected or private land, so confirm who owns a stretch before you collect.
The Crystal Mountain pegmatites in Larimer County are known for beryl, bismutite, fluorapatite, muscovite and autunite, but their land status is not recorded as public, so check before you go.
Private & Fee Sites
These sites are private, so you need the owner’s permission or a paid tour.
| Site | GPS Coordinates | Common Rocks & Minerals |
|---|---|---|
| Opportunity Mine (private — permission required) | 38.517407, -106.667927 | Albite, beryl, mica, tourmaline |
| Wisdom Ranch Mine (private — permission required) | 40.59778, -105.36444 | Beryl, chrysoberyl, granite |
| Phoenix Gold Mine, Idaho Springs (private mine — tour fee) | 39.748809, -105.565825 | Gold |
| Mollie Kathleen Gold Mine (private mine — tours only) | 38.752809, -105.16045 | Gold ore |
The abandoned Sedalia Mine, four miles north of Salida, is famous for large almandine garnet crystals of up to about 15 pounds, along with actinolite, epidote, corundum, chrysocolla, spinel and malachite. It is on private land and needs the owner’s permission.
The Wellsville area near Salida has calcite, jasper, manganese minerals and fossils around its old travertine quarry, but the quarry ground is private. The Sweet Home Mine near Alma closed for good in 2024, and the Cripple Creek & Victor mine is an active operation that offers tours rather than collecting.
Common Rocks & Minerals You Can Find in Colorado
GPS coordinates are a general reference only — always confirm access rules and land status before you go.
Colorado’s geology rests on Precambrian gneiss, schist and granite more than a billion years old, overlain by younger sedimentary rocks and cut by later volcanic and intrusive rocks. The granites and pegmatites give the state its gems, and the old mining districts give its metal ores.
The headline finds are Mount Antero aquamarine, Pikes Peak amazonite and smoky quartz, topaz, zircon and the state mineral rhodochrosite, while quartzite, sandstone, gneiss, amphibolite, quartz, mica and feldspar turn up across much of the state.
BTW: Do you want to know more about rock and mineral identification? The books listed below are the best ones you can find on the internet (Amazon links):
- Smithsonian Handbooks: Rocks & Minerals
- Gemstone & Crystal Properties (Quick Study Home)
- Ultimate Explorer Field Guide: Rocks and Minerals (National Geographic Kids)
If you are interested in checking out the best book about rockhounding in Colorado, you can find it by clicking here (Amazon link).
Rocks & Minerals
Each entry below shows how to recognize the stone and where to look for it in Colorado.
Quartzite
How to recognize it: Hard, sugary-looking rock of tightly fused quartz grains that breaks through the grains rather than around them, usually white, gray, pink or red, and hard enough to scratch glass.
Colorado quartzite comes in several colors, from the white, red-tinged Sawatch Quartzite of central Colorado to the green and white quartzite of the Tenmile Range.
Quartzite is so common that you can find it almost anywhere near the mountain ranges, especially in Lake County, Eagle County and the Sawatch and Mosquito ranges. The Sawatch Quartzite is a Late Cambrian formation about 500 million years old.
Much of the Tenmile Range, including Quandary Peak, is now inside the Camp Hale – Continental Divide National Monument, and parts of Eagle County are in the Eagles Nest Wilderness. Collect on open forest or BLM land outside them.
Sandstone
How to recognize it: Gritty to the touch like sandpaper, made of visible sand grains cemented together, often in layers of red, tan, buff or white.
The Cambrian Sawatch Sandstone glitters with quartz and feldspar grains, and the reddish Permian Lyons Sandstone of the Front Range is a popular building stone.
You can find sandstone from Colorado Springs and Manitou Springs to Fort Collins, Cañon City, White Canyon and Meeker. The type you find depends on the area: Sawatch Sandstone near the Sawatch Range, Lyons Sandstone along the Front Range.
Many of the most scenic sandstone outcrops, such as Garden of the Gods and Red Rocks, are city parks or open space where collecting is prohibited. Look on open BLM or national forest land instead.
Agate
How to recognize it: Translucent when held up to light, with a waxy shine and banded, lace or moss-like patterns inside.
Colorado rivers and mountains produce banded and multicolored agate, and some thundereggs are filled with agate.
Agate is easiest to find around Wolf Creek Pass, where both sites have exact coordinates.
| Location | GPS Coordinates |
|---|---|
| Wolf Creek Pass (San Juan National Forest) | 37.482293, -106.802337 |
| Wolf Creek streambed (San Juan National Forest) | 37.487272, -106.820292 |
Look also in the Del Norte area of Saguache County for plume agate, along Feltch Creek in Fremont County, in the South Platte River and around Whitewater in Mesa County. Rabbit Valley near the Utah line is in the McInnis Canyons National Conservation Area, so check local rules there.
Austin Bluffs in Colorado Springs is often listed for agate, chalcedony, jasper and carnelian, but it is city open space, so do not collect there.
Amphibolite
How to recognize it: Dark green to black, heavy metamorphic rock made mostly of shiny, needle-like hornblende crystals, often with white feldspar streaks or red garnet specks.
Amphibolite is one of the most common metamorphic rocks in Colorado, and the Colorado stones can show green, blue and brown shades as well as black.
You can find amphibolite in many of Colorado’s canyons, such as Big Thompson Canyon and Clear Creek Canyon, and in Chaffee and Gunnison counties, the Wet Mountains and along the Blue River.
The Needle Mountains also expose it, but they lie inside the Weminuche Wilderness, so check with the San Juan National Forest before collecting there.
Gneiss
How to recognize it: Hard, coarse-grained rock with distinct alternating light and dark bands of crystals; unlike schist, it does not split into thin sheets.
Gneiss is one of the oldest rocks in Colorado: some of it is more than 1.7 billion years old. It comes in gray, black or pink and is often cut by pegmatites.
Gneiss forms much of the Precambrian core of the Front Range, so you will see it in mountain canyons around Golden, Idaho Springs and Boulder County.
Look near Boulder County, Fremont County, Park County and the Wet Mountains for good pieces, and collect only on open public land.
Smoky Quartz
How to recognize it: Glassy quartz in smoky brown to nearly black that stays translucent at thin edges, usually as six-sided crystals with pointed tips, and hard enough to scratch glass.
Smoky quartz is one of the most popular minerals in Colorado, and in the Pikes Peak granite it often grows together with blue-green amazonite.
Smoky quartz turns up at these sites with exact coordinates; at Mount Antero and Stove Mountain it is an occasional find.
| Location | GPS Coordinates |
|---|---|
| Mount Antero (San Isabel National Forest — many mining claims) | 38.673594, -106.246717 |
| Devils Head (Pike National Forest) | 39.259968, -105.100757 |
| Wigwam Creek, west of Sugarloaf Peak (Pike National Forest) | 39.248687, -105.3387 |
| Stove Mountain (Pike National Forest) | 38.77611, -104.90083 |
Eight Mile Park near Cañon City, Crystal Peak and the Lake George area are other classic smoky quartz localities, but much of that ground is private or claimed.
Pikes Peak itself is a withdrawn area where the forest may close collecting, so ask the ranger district first.
Amazonite
How to recognize it: Opaque blue-green to turquoise feldspar, often streaked with white, in blocky crystals that split along flat, shiny faces.
Colorado amazonite is prized for its bright blue-green color, and the Pikes Peak granite is one of the best sources in the United States.
Amazonite turns up at these sites with exact coordinates; at Stove Mountain it is an occasional find.
| Location | GPS Coordinates |
|---|---|
| Pine Creek (Pike National Forest) | 39.325352, -105.114078 |
| Wigwam Creek, west of Sugarloaf Peak (Pike National Forest) | 39.248687, -105.3387 |
| Sentinel Rock (Pike National Forest) | 38.80464, -104.91777 |
| Stove Mountain (Pike National Forest) | 38.77611, -104.90083 |
Crystal Peak in Teller County has the deepest blue amazonite, often paired with black smoky quartz. Harris Park and Cheyenne Mountain are also listed, but check land status first.
Amazonite from Sugarloaf Mountain and Cook Mountain in Boulder County is on county and city land, where collecting is not allowed.
Aquamarine
How to recognize it: Pale blue to blue-green, glassy crystals, often six-sided and long, and hard enough to scratch glass.
Aquamarine is Colorado’s state gemstone, and the crystals from Mount Antero are small but beautifully colored and nearly flawless.
Aquamarine is found at these sites with exact coordinates.
| Location | GPS Coordinates |
|---|---|
| Mount Antero (San Isabel National Forest — many mining claims) | 38.673594, -106.246717 |
| Mount White (San Isabel National Forest — many mining claims) | 38.656264, -106.223035 |
| Mount Princeton (San Isabel National Forest) | 38.748971, -106.242564 |
The crystals grow in granite pegmatite and rarely exceed ten carats, but their color and clarity make them valuable. Most of the gem ground on Antero and Mount White is under active claims, so check before you dig.
Aquamarine is also reported from Fremont, Clear Creek and Gunnison counties. The pegmatites of Centennial Cone are inside a Jefferson County park, where collecting is prohibited.
Rhodochrosite
How to recognize it: Rose-pink to raspberry-red mineral, soft enough to scratch with a knife, in rhomb-shaped crystals or banded pink-and-white crusts.
Colorado is one of the few places in the world with gem-quality rhodochrosite, which ranges here from pink to brown and was once thrown away as waste at the state’s silver mines. It is an ore of manganese, and banded pieces are cut for jewelry.
Rhodochrosite turns up on old mine dumps at these sites with exact coordinates.
| Location | GPS Coordinates |
|---|---|
| Eureka ghost town (BLM) | 37.873606, -107.563271 |
| Willis Gulch (San Isabel National Forest) | 39.066258, -106.390303 |
The Sweet Home Mine near Alma produced the most famous specimens, but it is private and closed for good in 2024. Mine dumps around Alma, Gilpin County and San Juan County are other places to look, always with the owner’s or claimant’s permission.
Topaz
How to recognize it: Very hard, glassy crystals that scratch quartz, colorless, pale blue or sherry-colored, heavier than quartz and splitting cleanly across the crystal.
Colorado topaz is usually clear or sherry yellow, and rare light pink and pale blue crystals come from the Pikes Peak region.
Topaz is found at these sites with exact coordinates.
| Location | GPS Coordinates |
|---|---|
| Mount Antero (San Isabel National Forest — many mining claims) | 38.673594, -106.246717 |
| Long Hollow (Pike National Forest) | 39.182124, -105.134414 |
Pieces of more than a pound have been found in Colorado cliffs and mountainsides. The Tarryall Mountains and the Pikes Peak granite have produced large crystals, but the Tarryall pegmatites lie in the Lost Creek Wilderness and Pikes Peak is a withdrawn area. Ask the Pike National Forest before you collect there.
Glen Cove on the north side of Pikes Peak is known for natural blue topaz in cliff pockets. Crystal Park and Lake George are mostly private land.
Zircon
How to recognize it: Small, heavy and very hard crystals, usually brown to reddish, shaped like square prisms capped with pyramids, with a bright, almost diamond-like shine.
Zircon is found in all kinds of Colorado rocks, but the large, colorful crystals collectors want come from the Pikes Peak granite west of Colorado Springs.
Zircon is easiest to find at St. Peters Dome, which has exact coordinates.
| Location | GPS Coordinates |
|---|---|
| St. Peters Dome (Pike National Forest) | 38.747128, -104.911597 |
The Eureka Tunnel area, Rock Creek and the mine dumps west of Gold Camp Road also produce zircon, but their land status is not recorded as public, so check first.
North Cheyenne Cañon, Helen Hunt Falls and Bear Creek Cañon are Colorado Springs city parks, where collecting is prohibited.
Gold
How to recognize it: Heavy, soft and bendable, and it stays bright yellow even in shade, unlike glittering pyrite.
The Colorado Gold Rush of 1858–1861 brought an estimated 100,000 people to the state, and gold flakes still turn up in many rivers and streams.
These private mines with exact coordinates offer gold panning or tours.
| Location | GPS Coordinates |
|---|---|
| Phoenix Gold Mine, Idaho Springs (private mine — tour fee) | 39.748809, -105.565825 |
| Mollie Kathleen Gold Mine (private mine — tours only) | 38.752809, -105.16045 |
Recreational panning is allowed in the Arkansas Headwaters Recreation Area where signs do not prohibit it, and on most BLM and national forest streams. The Arkansas River, Alamosa River and Blue River near Breckenridge are popular choices, and it pays to know what rocks to look for when gold prospecting.
Castlewood Canyon State Park and Gold Strike Park in Arvada are often listed for gold, but collecting is not allowed in state parks or city parks.
Fluorite
How to recognize it: Glassy cubes in purple, green, yellow or colorless, soft enough to scratch with a knife, splitting into flat, triangular-faced pieces, and many specimens glow under UV light.
Fluorite is one of the most common minerals on Colorado’s collecting sites, especially in the pegmatites of Mount Antero and the Pikes Peak granite.
Fluorite is common at these sites with exact coordinates.
| Location | GPS Coordinates |
|---|---|
| Mount Antero (San Isabel National Forest — many mining claims) | 38.673594, -106.246717 |
| Stove Mountain (Pike National Forest) | 38.77611, -104.90083 |
| Wigwam Creek, west of Sugarloaf Peak (Pike National Forest) | 39.248687, -105.3387 |
| Sentinel Rock (Pike National Forest) | 38.80464, -104.91777 |
Green fluorite is an occasional find at Trout Creek Pass, and fluorite also occurs at Unaweep Canyon and in the Upper Browns Creek area below Mount Antero.
Garnet
How to recognize it: Glassy, rounded crystals with many flat faces, usually deep red to orange.
Colorado garnets range from the giant almandine crystals of the Sedalia Mine to the small red spessartine of Ruby Mountain.
Garnet is found at Cement Creek, which has exact coordinates.
| Location | GPS Coordinates |
|---|---|
| Cement Creek (Gunnison National Forest) | 38.931201, -106.769938 |
Garnet is also common in the Turret Mining District and an occasional find at Trout Creek Pass, but most Turret ground is private. The Sedalia Mine is private and needs permission.
Ruby Mountain near Nathrop, named for its red “rubies” that are really garnets, lies in the Browns Canyon National Monument area and its recreation site is a state park unit, so do not collect there.
Quartz
How to recognize it: Glassy and hard enough to scratch glass, usually clear to white, often in six-sided crystals with pointed tips, breaking with curved, shell-like surfaces.
Clear and milky quartz is common at nearly every Colorado pegmatite and mining site, and Trout Creek Pass also produces rose quartz.
Quartz is common at these sites with exact coordinates.
| Location | GPS Coordinates |
|---|---|
| Stove Mountain (Pike National Forest) | 38.77611, -104.90083 |
| Wigwam Creek, west of Sugarloaf Peak (Pike National Forest) | 39.248687, -105.3387 |
| Sentinel Rock (Pike National Forest) | 38.80464, -104.91777 |
| Wolf Creek streambed (San Juan National Forest) | 37.487272, -106.820292 |
Quartz is also common at Trout Creek Pass, Bear Creek west of Denver and in the Turret Mining District. Check land status at each of them first.
Galena
How to recognize it: Very heavy, lead-gray and metallic, often in shiny cubes that break into smaller cubes, and soft enough to scratch with a knife.
Galena was the main lead and silver ore of Colorado’s mining camps, and it still turns up on old dumps.
Galena is found at these sites with exact coordinates.
| Location | GPS Coordinates |
|---|---|
| Stove Mountain (Pike National Forest) | 38.77611, -104.90083 |
| Last Chance Mine, Creede (private mine — fee) | 37.884018, -106.936668 |
Most historic mine dumps are private or under claim, so ask the owner before you collect, and never enter old workings.
Calcite
How to recognize it: Usually white, colorless or honey-colored and soft enough to scratch with a knife; it breaks into slanted, box-like blocks and fizzes in a drop of vinegar or dilute acid.
Calcite is common in Colorado’s limestone, travertine and mineral veins.
Calcite is common at Unaweep Canyon, which has exact coordinates.
| Location | GPS Coordinates |
|---|---|
| Unaweep Canyon (BLM) | 38.85354, -108.55445 |
The Wellsville area near Salida has calcite around its old travertine quarry, but the quarry ground is private.
The zeolite and calcite quarries of North and South Table Mountains near Golden are in Jefferson County parks, where collecting is prohibited.
Hematite
How to recognize it: Heavy, metallic gray to black or dull red iron ore that always leaves a reddish-brown streak; the specular variety glitters with flat, mirror-like flakes.
Hematite is common in Colorado’s iron-rich rocks, from the cliffs of Unaweep Canyon to the old iron mines of the Turret district.
Hematite is found at these sites with exact coordinates.
| Location | GPS Coordinates |
|---|---|
| Unaweep Canyon (BLM) | 38.85354, -108.55445 |
| Sentinel Rock (Pike National Forest) | 38.80464, -104.91777 |
Hematite is also common in the Turret Mining District, whose Calumet iron mine is private property.
Mica
How to recognize it: Shiny, flaky mineral that peels into thin, flexible, see-through sheets with a fingernail; muscovite is silvery to pale brown and biotite dark brown to black.
Muscovite and biotite mica are common in Colorado’s pegmatites, from the Sawatch Range to the Front Range.
Mica is found at the Opportunity Mine, which has exact coordinates but needs the owner’s permission.
| Location | GPS Coordinates |
|---|---|
| Opportunity Mine (private — permission required) | 38.517407, -106.667927 |
Biotite and muscovite are common at Trout Creek Pass, in the Turret Mining District and in the Upper Browns Creek area, and muscovite at the Crystal Mountain pegmatites in Larimer County. Check land status at each of them.
Jasper
How to recognize it: Opaque even at thin edges, with a smooth waxy feel and solid red, yellow, brown or green colors, often with swirls or spots.
Colorado jasper is common in the volcanic San Juan Mountains and in the mining districts around Salida.
Jasper is found at these sites with exact coordinates.
| Location | GPS Coordinates |
|---|---|
| Wolf Creek Pass (San Juan National Forest) | 37.482293, -106.802337 |
| Wolf Creek streambed (San Juan National Forest) | 37.487272, -106.820292 |
| Last Chance Mine, Creede (private mine — fee) | 37.884018, -106.936668 |
Jasper is also common in the Turret Mining District and the Wellsville area, but both are mostly private.
Feldspar
How to recognize it: Blocky crystals in white, pink, gray or tan that split along flat, shiny faces at nearly right angles; slightly softer than quartz.
Pink feldspar is common in the pegmatites of Trout Creek Pass, and the blue-green amazonite of the Pikes Peak region is also a feldspar.
Trout Creek Pass is the easiest place to look for feldspar crystals, together with quartz and mica. Land along the highway is mixed, so check before you collect.
Fossils
How to recognize it: Regular shapes that rocks do not make on their own: shells, spirals, ribbed or segmented outlines, teeth, or the imprint of a leaf or bone.
Colorado fossils range from the late Eocene insects and plants of Florissant to the Jurassic dinosaurs of the Western Slope.
The Florissant Fossil Quarry is the easiest place to collect fossils legally, but it is closed for 2026 and plans to reopen in spring 2027. Fossils are also common in the Wellsville area and occasional at Trout Creek Pass.
On BLM and national forest land you may collect invertebrate and plant fossils for personal use, but vertebrate fossils need a permit. Fossil collecting is banned in the McInnis Canyons National Conservation Area and Florissant Fossil Beds National Monument.
Other Notable Rocks & Minerals in Colorado
Our original sources also mention these rocks and minerals, which are either rare or found at only a few places.
Gabbro, a coarse, dark plutonic rock, occurs in a few Colorado bodies such as the Electra Lake Gabbro in La Plata County and the Wet Mountains. It is not widespread, and Pikes Peak and Longs Peak, sometimes listed for gabbro, are actually granite.
Obsidian and Apache tears come from Ruby Mountain near Nathrop, where neighboring Dorothy Hill and Sugarloaf Mountain also produce smoky quartz and sanidine. Apatite is a common accessory mineral at Mount Antero.
Amethyst comes from Creede and Unaweep Canyon, rhodonite from the Creede mines and turquoise from the Last Chance Mine. Our sources also list diamond at Diamond Peak near the Wyoming line, but Colorado diamonds are far too rare to plan a trip around.
Silver and sphalerite come from the old mining districts, and rare finds reported in our sources include sapphire, lapis lazuli, peridot, opal, blue barite, geodes, diorite, beryl, chrysoberyl, brannerite, molybdenite and the zeolites of the Table Mountains near Golden.
State Gem, Mineral, Rock & Fossil of Colorado
Colorado has an official gem, mineral, rock and fossil, all chosen for their link to the state’s geology.
| Symbol | Name | Adopted |
|---|---|---|
| State gemstone | Aquamarine | 1971 |
| State mineral | Rhodochrosite | 2002 |
| State rock | Yule Marble | 2004 |
| State fossil | Stegosaurus | 1982 |
Aquamarine comes mainly from Mount Antero and Mount White in Chaffee County, where the stones range from pale blue to green. Rhodochrosite is best known from the Sweet Home Mine near Alma, whose 1992 find, the Alma King, is on display at the Denver Museum of Nature & Science.
Yule Marble is found only in the Yule Creek Valley near the town of Marble, and it was named the state rock after a petition by a Lakewood Girl Scout troop. It was used in the Colorado State Capitol, the Lincoln Memorial and the Tomb of the Unknown Soldier.
Stegosaurus was a large, plant-eating dinosaur of the Late Jurassic, about 150 million years ago, with broad plates on its back and spikes on its tail. Its fossils were discovered in Colorado, and as a vertebrate fossil it may never be collected without a permit.
Rockhounding Clubs in Colorado
Colorado’s clubs are active, and their field trips can get you onto claims and private ground that are otherwise hard to access.
- Colorado Mineral Society — a non-profit educational club founded in 1936 and based in Lakewood, with monthly meetings from October to May, field trips and a youth program.
- Mile Hi Rock and Mineral Society — a Denver-area non-profit that educates members on all aspects of the rock and mineral hobby, with a newsletter, meetings and field trips.
- Columbine Gem and Mineral Society — founded in 1947 and based in Salida, serving Buena Vista and the Chaffee County gem country with meetings and field trips to local mining claims.
If you are new to rockhounding in Colorado, joining one of these clubs is the easiest way to learn which ground is open.
Recommended Rockhounding Gear
While special gear is not required to find nice rocks and fossils, having the right tools will help you find more than what’s simply laying around on the open ground. Here are some of the more basic tools and safety gear for interested rockhounds.
Geological Hammer
This 22oz Pointed-Tip Rock Pick by Estwing (Amazon link) is recommended for its durability and shock-reducing grip.
A rock pick is essential when collecting mineral specimens from a hard substrate such as stone. The pick’s handle is shock-resistant, making it more comfortable for use for longer times in the field.
Geology Pick
The Geology pick by Estwing (Amazon link) is a good choice for those starting out in the hobby as well as seasoned professionals.
The hammer comes with a pointed tip on one side of the head and a chiseled end on the other. This pick is good for excavating interesting mineral and fossil specimens.
Mini Shovel
The Mini D-Handle Round Point Shovel by Stanley (Amazon link) pairs convenience with durability. Especially in areas of soft material such as sand or clay, it is nice to have a sturdy shovel that is easy to carry.
The D-shaped handle gives you more leverage when digging on your knees, which is something that similarly sized standard-handled shovels wouldn’t provide.
Heavy Duty Work Gloves by Ironclad
Working with your hands in rockhounding environments can be rough; it is easy to get cuts or abrasions when in the field. Protecting your hands is important, especially while working with sharp or abrasive rocks.
The Heavy Duty Work Gloves by Ironclad (Amazon link) protect your hands from sharp rocks and tools. They are machine washable, highly abrasion resistant, and durable.
Safety Glasses
Eye protection is a must when breaking up a rock or any sort of work where debris could cause injury to your eyes.
The 3M Safety Glasses (Amazon link) are anti-fog and have a corded earplug system, as well as a removable foam gasket. The clear, scratch-resistant lenses shield the eyes against harmful ultraviolet light as well as prevent eye injury from flying rock chips.
First Aid Kit
With its 299 pieces, the Only Emergency First Aid Kit (Amazon link) is a good one for rockhounds. Of course, it’s best to avoid injuring yourself but if things go wrong it’s good to be prepared.
Some of the items found in the kit include fabric and plastic bandages, painkillers, gauze and pads, cold packs, wound closers, and many more.
FAQ About Rockhounding in Colorado
These are the questions that come up most often when planning a Colorado rockhounding trip.
Do I need a permit to collect rocks in Colorado?
Not for casual, personal collecting with hand tools on BLM land or in most national forests. Vertebrate fossils always need a permit, the Pike-San Isabel forests ask for a free permit for petrified wood, and state parks, national parks and monuments and city or county parks do not allow collecting at all.
Can you collect rocks in Colorado state parks?
No. Colorado Parks and Wildlife rules prohibit removing rocks, minerals or other objects of geological value from state parks. The one exception is recreational gold panning in the Arkansas Headwaters Recreation Area where signs allow it.
What rare rocks can you find in Colorado?
Yule Marble, the state rock, occurs only near Marble, and the Florissant shale preserves exceptionally fine fossil insects and plants. Diorite, gabbro and Ruby Mountain obsidian are other less common finds.
What rare minerals can you find in Colorado?
Gem-quality rhodochrosite is the standout, since Colorado is one of the few places in the world it occurs. Rare finds also include natural blue topaz, sapphire, lapis lazuli, peridot, opal, blue barite and diamond.
What is the most famous rock or mineral found in Colorado?
Two answers come up most often: rhodochrosite, the state mineral, and the pairing of black smoky quartz with blue-green amazonite from the Pikes Peak granite. The Crystal Peak, Devils Head and Crystal Park areas are famous for the combination.
Conclusion
Colorado offers what few states can match: high-altitude gem fields with aquamarine and topaz, the amazonite and smoky quartz of the Pikes Peak granite, and world-class rhodochrosite from its old mining districts.
Plan around altitude and access. The best pegmatite sites are snowbound outside midsummer, and much of the promising ground is private or claimed, so a club field trip is often the easiest way in.
If you are interested in checking out the best rockhounding tools, you can find them by clicking here (Amazon link).
| Research Behind This Guide |
|---|
This guide was compiled and edited by the How to Find Rocks team. It consolidates, fact-checks, and builds on original research and field reporting first published on this site by the following subject-matter expert(s): Van Pigtain — Former earth science and geology lab instructor at the University of North Texas and Cambridge-educated researcher with a Ph.D.-level background in Archaeology, backed by decades of hands-on fieldwork. See all articles by Van → Lauren Ballejos — Rockhounding enthusiast, member of the Flagg Mineral Foundation (FMF), and professional content writer with a growing personal rock collection. See all articles by Lauren → |