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This guide covers the best places to rockhound in Oregon, the rocks and minerals you are most likely to find, and the collecting limits that apply on each type of land.
BLM land allows a reasonable personal amount (under 250 lbs) without a permit, national forests small amounts for personal use, and the ocean shore 1 gallon of agates and other stones per person per day.
Start with Glass Butte for obsidian, the Ochoco thunderegg beds, the free sunstone area north of Plush, and the central coast beaches after a winter storm.
Rockhounding Regulations & Laws in Oregon
Oregon is one of the friendliest states for rockhounds, but the limits depend on who manages the land. Check whether you are on BLM ground, in a national forest, on the coast or in a park before you pick anything up.
- BLM land: a reasonable amount for personal use, under 250 lbs, needs no permit. Petrified wood is limited to 25 lbs plus one piece per day and 250 lbs per year.
- National forests: small amounts for personal, noncommercial use, collected by hand. Some wilderness areas are closed to collecting.
- Ocean shore: 1 gallon of agates and other non-living items (shells, stones, fossils) per person per day, and no more than 3 gallons per year, under OAR 736-021-0090.
- Oregon State Parks: small amounts for personal use, only where the park has not posted restrictions.
- Wildlife refuges: Hart Mountain National Antelope Refuge allows surface collecting by hand of up to 7 lbs per person per day. Most other refuges do not allow collecting.
- Army Corps of Engineers land: collecting is prohibited, including at reservoirs such as Applegate Lake and Green Peter Lake.
- Never collectable: vertebrate fossils (including shark teeth) and artifacts on federal land, and anything in national parks, national monuments, BLM campgrounds or on tribal land — Crater Lake, Oregon Caves, the John Day Fossil Beds and the Warm Springs Reservation along the Deschutes included.
- Hand tools only — no motorized equipment.
Rivers have their own rules, and some stretches are State Scenic Waterways with stricter limits. The public may use the beds and banks of Oregon-owned waterways up to the ordinary high-water line, and above it the land is usually private.
- Essential Salmonid Habitat: less than 1 cubic yard by hand at any one site, and no more than 5 cubic yards in one stream per year, needs no permit (OAR 141-085-0530).
- State Scenic Waterways: any removal needs a permit.
- Other waterways: a permit is generally needed only for 50 cubic yards or more.
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 Oregon
These ten sites give the best chance of a good find. The volcanic high desert holds the obsidian, thundereggs and sunstone, while the coast is the easiest place to pick up agate.
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.
Six of the sites are on free BLM or national forest land, three are ocean beaches with a 1-gallon daily limit, and Lucky Strike is a fee dig.
| Site | Access | GPS Coordinates |
|---|---|---|
| Glass Butte | Public (BLM) | 43.556812, -120.074481 |
| Oregon Sunstone Public Collection Area (approximate) | Public (BLM) | 42.7232, -119.8606 |
| Whistler Spring | Public (national forest) | 44.496090, -120.484738 |
| Maury Mountains (general area) | Public (national forest) | 44.06, -120.41 |
| Hampton Butte (approximate) | Public (BLM) | 43.7743, -120.2819 |
| Lucky Strike Mine | Private (fee dig) | 44.517050, -120.497542 |
| Agate Beach and Moolack Beach | Public (ocean shore) | 44.665859, -124.059076 |
| Lincoln City beaches (general area) | Public (ocean shore) | 44.97, -124.02 |
| Short Beach, Oceanside (general area) | Public (ocean shore) | 45.48, -123.97 |
| Quartzville Creek (approximate) | Public (BLM) | 44.5624, -122.4122 |
Glass Butte
Glass Butte, south of Highway 20 about 80 miles east of Bend, is one of the best obsidian localities in the country. The area is set aside for recreational obsidian collecting.
Besides black obsidian you can find rainbow and sheen obsidian, and many pieces are clean of dirt and ash.
Oregon Sunstone Public Collection Area
This free BLM collection area in Rabbit Basin, about 25 miles north of Plush, is the place to collect Oregon’s state gemstone yourself. From Plush, follow the Hogback Road north and the signed BLM roads to the entrance.
Orange posts mark the boundary, and private mining claims lie next to it and on a small parcel inside it, so stay off the claims. There is a pit toilet, shade and free camping, but no water, and summers are extremely hot.
Whistler Spring
Whistler Spring in the Ochoco National Forest, northeast of Prineville, is the classic place to dig thundereggs, Oregon’s state rock. Nearby White Fir Spring is another Forest Service collecting site for thundereggs and jasper.
The roads are dirt, so plan for a high-clearance vehicle.
Maury Mountains
The Maury Mountains, in the Ochoco National Forest southeast of Prineville, are known for moss agate. Look in the gravels and on the slopes rather than digging.
Hampton Butte
Hampton Butte is a remote butte on BLM land in central Oregon. It is known for petrified wood, and the area also gives agate and jasper.
Lucky Strike Mine
Lucky Strike, near Mitchell on the Wheeler–Crook county line, is a family-run fee-dig thunderegg mine high in the Ochoco Mountains. You pay to dig and keep what you find.
A four-wheel-drive vehicle is recommended for the mine roads. Check prices and opening times before you go.
Agate Beach and Moolack Beach
These two beaches near Newport sit on one of the most reliable agate stretches in the state, which runs north past Beverly Beach to Depoe Bay. Carnelian turns up here too.
Come in winter or early spring, when storms strip the sand and expose fresh gravel beds.
Lincoln City Beaches
Lincoln City’s beaches give agate, jasper, petrified wood, marine fossils, carnelian and bloodstone. You can reach the Lincoln City shore from Highway 101 at these access points:
- Roads End State Park
- D River Wayside
- Siletz Bay Park
Short Beach, Oceanside
Short Beach, the famous “agate beach” just south of Cape Meares and north of Oceanside, is a small cove in Tillamook County. Agates wash down from the creeks onto it.
Quartzville Creek
Recreational panning and rockhounding are allowed on BLM land along Quartzville Creek in Linn County, between Rocky Top Bridge and Galena Creek. Besides gold, the creek gives pyrite, quartz, agate, jasper and petrified wood.
Other Notable Rockhounding Spots in Oregon
Oregon has many more good sites than the ten above, from Ochoco thunderegg beds to river gravel bars and smaller agate beaches.
Public Land in Central and Eastern Oregon
These three high desert sites are in the Ochoco and Fremont national forests and on the Hart Mountain refuge, and all of them give thundereggs.
| Site | GPS Coordinates | Common Rocks & Minerals |
|---|---|---|
| White Fir Spring (approximate) | 44.4048, -120.5536 | Thundereggs, jasper |
| Crane Mountain | 42.062281, -120.241046 | Thundereggs |
| Hart Mountain (National Antelope Refuge — surface only, 7 lbs/day) | 42.459368, -119.741424 | Thundereggs, opal, Oregon sunstone |
Crook County has several more Forest Service collecting sites: Eagle Rock for agate, Fischer Canyon for agate, jasper, petrified wood, calcite and leaf fossils, Bear Creek for petrified wood, Congleton Hollow and Dendrite Butte for opalized wood and limb casts, and the area north of Ochoco Reservoir for agate and jasper.
Farther east, Succor Creek Canyon is known for thundereggs and geodes, and the Owyhee country of Malheur County for Owyhee jasper and opal.
Rivers, Creeks and Mountains of Western and Southern Oregon
These rivers, creeks and ridges give agate, jasper, carnelian, petrified wood, quartz, gold, soapstone and garnet. River gravels are most productive in late summer, when water levels are low.
| Site | GPS Coordinates | Common Rocks & Minerals |
|---|---|---|
| Willamette River | 44.805439, -123.093932 | Agate, jasper, carnelian, bloodstone, geodes, petrified wood |
| Sheep Creek | 44.410385, -122.214237 | Agate |
| Clear Creek, Columbia County | 45.805824, -123.279861 | Agate, carnelian |
| Umpqua River | 43.638757, -123.860433 | Petrified wood, carnelian |
| Rogue River | 42.435904, -123.182231 | Gold, quartz |
| Althouse Creek | 42.064615, -123.521537 | Gold, quartz |
| Elliot Creek Ridge | 42.014561, -123.047779 | Soapstone, garnet |
| Téel Creek (formerly Squaw Creek) | 42.037539, -123.029110 | Soapstone |
| Powder River | 44.744255, -117.050973 | Quartz |
The best stretch of the Willamette runs from north of Salem to south of Corvallis, and the North Santiam and South Santiam rivers give agate, jasper and petrified wood.
In the south, the Bohemia Mining District is known for gold and quartz, with amethyst as a rare find. The Applegate River and the Klamath Mountains also have placer gold.
More Beaches on the Oregon Coast
Every Oregon beach with gravel patches can hide agates. Beverly Beach is reliable for agate, and Sunset Beach and Bob Straub State Park for bloodstone.
| Site | GPS Coordinates | Common Rocks & Minerals |
|---|---|---|
| Beverly Beach State Park (approximate; ocean shore) | 44.7307, -124.0533 | Agate |
| Sunset Beach, Tillamook County | 45.693855, -123.939052 | Bloodstone |
| Bob Straub State Park (ocean shore) | 45.182434, -123.964551 | Bloodstone |
On the central coast, the beaches around Depoe Bay and Yachats are reliable for agate. On the north coast, bloodstone turns up around Astoria, and the Tillamook County beaches from Bayocean to Rockaway, Manhattan Beach and Nehalem can give the odd moonstone.
The south coast around Coos Bay, Bandon, Port Orford, Gold Beach, Merchants Beach and Brookings gives agate, jasper, petrified wood, serpentine and fossils, and nephrite jade is a rare find near Brookings. Reach the shore from Highway 101 at Whiskey Run Lane, Cape Blanco State Park, Otter Point, the South Jetty of the Chetco River and McVay Rock.
Private and Fee-Dig Sites
These fee-dig mines are on private claims, where you pay to dig and keep what you find.
| Site | GPS Coordinates | Common Rocks & Minerals | Fees & Rules |
|---|---|---|---|
| Polka Dot Mine, Priday beds | 44.760288, -120.829402 | Thundereggs, agate | Fee dig — check dates and prices |
Next to the free BLM sunstone area, the Dust Devil and Double Eagle mines offer fee digging for Oregon sunstone.
Common Rocks & Minerals You Can Find in Oregon
GPS coordinates are a general reference only — always confirm access rules and land status before you go.
Oregon’s finds are mostly a product of volcanism — rhyolitic lava made the thundereggs and obsidian, and basalt flows carry the sunstone the state is known for.
Agate, jasper and petrified wood are common almost everywhere, from the coast to the high desert. The finds Oregon is famous for are thundereggs, obsidian from Glass Butte and Oregon sunstone, a gem the state effectively has to itself.
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 Oregon, you can find it by clicking here (Amazon link).
Rocks & Minerals
Each of the twelve finds below has identification tips and its best locations.
Agate
How to recognize it: Translucent when held up to light, with a waxy shine and banded, lace or moss-like patterns inside.
Banded, moss and plume agates all wash up on the coast, sometimes in blue or purple. The beaches are best after winter storms, when fresh gravel is exposed.
| Location | GPS Coordinates |
|---|---|
| Agate Beach and Moolack Beach | 44.665859, -124.059076 |
| Beverly Beach State Park (approximate; ocean shore) | 44.7307, -124.0533 |
| Clear Creek, Columbia County | 45.805824, -123.279861 |
| Sheep Creek | 44.410385, -122.214237 |
On the coast, also try Depoe Bay, Yachats, Short Beach near Oceanside and Gold Beach. Inland, Eagle Rock and the Maury Mountains in Crook County are known for agate and moss agate, and agate also turns up around Ochoco Reservoir and Eagle Point in Jackson County.
Obsidian
How to recognize it: Natural volcanic glass: glossy, usually black, and it breaks with smooth, curved, razor-sharp edges.
Glass Butte is the place for iridescent rainbow and sheen obsidian, and colors vary well beyond black. The butte is itself a rhyolite dome, and its glassy flows are the source of the obsidian.
| Location | GPS Coordinates |
|---|---|
| Glass Butte | 43.556812, -120.074481 |
Obsidian also occurs around Lakeview and elsewhere in Lake County, across southeast Oregon, and in the gravels of the Willamette Valley.
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.
Biggs jasper is a picture jasper prized for its dark coloring and intricate patterns, and Deschutes jasper from the same area is often confused with it. Owyhee jasper shows desert-scene patterns once polished.
| Location | GPS Coordinates |
|---|---|
| White Fir Spring (approximate) | 44.4048, -120.5536 |
| Hampton Butte (approximate) | 43.7743, -120.2819 |
Much of Oregon’s jasper is carried down rivers from its volcanic sources. Look in the Owyhee country of Malheur County, along the Deschutes River, in the Willamette Valley, around Ochoco Reservoir, at Fischer Canyon and on Lincoln City’s beaches.
Thunderegg
How to recognize it: Round to knobby nodules from golf-ball to grapefruit size with a rough gray-brown rind; unlike hollow geodes they feel solid and heavy, and the agate or opal core only shows when they are cut.
Oregon’s state rock since 1965, formed in silica-rich rhyolitic lava and filled with agate, jasper or opal.
| Location | GPS Coordinates |
|---|---|
| Whistler Spring | 44.496090, -120.484738 |
| White Fir Spring (approximate) | 44.4048, -120.5536 |
| Crane Mountain | 42.062281, -120.241046 |
| Hart Mountain (National Antelope Refuge — surface only, 7 lbs/day) | 42.459368, -119.741424 |
| Lucky Strike Mine (private claim — fee dig) | 44.517050, -120.497542 |
| Polka Dot Mine, Priday beds (private mine — fee dig) | 44.760288, -120.829402 |
Thundereggs are most abundant in central Oregon (Wasco, Jefferson, Wheeler and Crook counties) and in Malheur County in the southeast. Also try the high desert near Prineville and Madras, and Succor Creek Canyon.
Petrified Wood
How to recognize it: Wood turned to stone with a glassy to waxy, opal-like shine, often still showing growth rings and bark texture; much heavier than real wood.
Both opalized and agatized wood occur here, and Dendrite Butte also gives limb casts. Rivers and beaches carry tumbled pieces far from their source.
| Location | GPS Coordinates |
|---|---|
| Hampton Butte (approximate) | 43.7743, -120.2819 |
| Willamette River | 44.805439, -123.093932 |
| Umpqua River | 43.638757, -123.860433 |
In Crook County, Bear Creek, Congleton Hollow, Dendrite Butte and Fischer Canyon are the classic spots. River pieces also turn up in Quartzville Creek and the Santiam, and on Lincoln City’s beaches and the south coast.
Soapstone
How to recognize it: Soft enough to scratch with a fingernail, gray-green to dark green, with a smooth, soapy or greasy feel.
High-quality soapstone comes from Elliot Creek Ridge, west of Acorn Woman Lakes (formerly Squaw Lakes), often together with garnet.
| Location | GPS Coordinates |
|---|---|
| Elliot Creek Ridge | 42.014561, -123.047779 |
| Téel Creek (formerly Squaw Creek) | 42.037539, -123.029110 |
Oregon Sunstone
How to recognize it: Transparent to translucent feldspar, from nearly colorless and pale yellow to red and green, that shows a coppery glitter (schiller) when you turn it in sunlight.
The state gemstone since 1987. Its color comes from copper, about 20 parts per million in yellow stones and 200 in red ones. Red stones are the most valuable.
| Location | GPS Coordinates |
|---|---|
| Oregon Sunstone Public Collection Area (approximate; BLM, free) | 42.7232, -119.8606 |
| Hart Mountain (National Antelope Refuge — surface only, 7 lbs/day) | 42.459368, -119.741424 |
Plush and Lakeview are the usual bases for a trip to the sunstone area.
Opal
How to recognize it: Glassy to waxy and softer than quartz; precious opal flashes rainbow colors as you turn it, while common opal is milky or translucent without that play of color.
Common opal and fire opal are the most abundant here, and some thundereggs have opal cores, including the rare Owyhee blue opal.
| Location | GPS Coordinates |
|---|---|
| Hart Mountain (National Antelope Refuge — surface only, 7 lbs/day) | 42.459368, -119.741424 |
Opal comes from the Owyhee country of Malheur County, near the Idaho border.
Carnelian
How to recognize it: Translucent orange to red-brown chalcedony that glows warmly when held up to light, with a waxy shine and usually little or no banding.
In Oregon, carnelian turns up in creek and river gravels with jasper, petrified wood and agate.
| Location | GPS Coordinates |
|---|---|
| Clear Creek, Columbia County | 45.805824, -123.279861 |
| Umpqua River | 43.638757, -123.860433 |
In Linn County, the gravel bars and hillsides of the upper Calapooia in the Willamette National Forest also give carnelian, plum agate and jasper. On the coast, carnelian turns up with the agate on Lincoln City’s beaches and around Newport.
Bloodstone
How to recognize it: Opaque dark green chalcedony speckled with small red to orange-red spots, with a waxy shine.
Oregon bloodstone turns up in the same coastal and river gravels as jasper and agate.
| Location | GPS Coordinates |
|---|---|
| Sunset Beach, Tillamook County | 45.693855, -123.939052 |
| Bob Straub State Park (ocean shore) | 45.182434, -123.964551 |
| Willamette River | 44.805439, -123.093932 |
Bloodstone turns up on the north coast around Astoria and on the central coast at Lincoln City. In southern Oregon, look around Butte Falls and Eagle Point in Jackson County.
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.
Oregon gives clear, smoky and drusy quartz.
| Location | GPS Coordinates |
|---|---|
| Althouse Creek | 42.064615, -123.521537 |
| Rogue River | 42.435904, -123.182231 |
| Powder River | 44.744255, -117.050973 |
Wherever there is gold in Oregon, some type of quartz is usually nearby, so the gold areas below are worth a look. Quartzville Creek also gives quartz.
Gold
How to recognize it: Heavy, soft and bendable, and it stays bright yellow even in shade, unlike glittering pyrite.
Oregon had its own gold rush after gold was found in the southwestern rivers in the 1850s, and Althouse Creek was one of the richest early diggings.
| Location | GPS Coordinates |
|---|---|
| Rogue River | 42.435904, -123.182231 |
| Althouse Creek | 42.064615, -123.521537 |
The Klamath Mountains, the Applegate River and the Bohemia Mining District are other classic gold areas, and Quartzville Creek has BLM land open to recreational panning. For laws and more locations, see our guide to gold prospecting in Oregon.
Oregon State Rock, Gemstone, Fossil & Minerals
Oregon has an official rock, gemstone, fossil and a pair of state minerals. This table shows each one and when it was adopted.
| Symbol | Year | What It Is |
|---|---|---|
| Thunderegg (state rock) | 1965 | Nodule from rhyolitic lava, filled with agate, jasper or opal |
| Oregon sunstone (state gemstone) | 1987 | Copper-bearing feldspar from south-central Oregon |
| Metasequoia (state fossil) | 2005 | The dawn redwood, a conifer whose fossil leaves are common in Oregon |
| Oregonite and josephinite (state minerals) | 2013 | Rare nickel-iron minerals first found in Josephine Creek |
Rockhounding Resources in Oregon
These official pages list the current rules and collecting sites.
- BLM Oregon/Washington rock collecting guide — current collecting limits on BLM land.
- Ochoco National Forest rocks and minerals — Forest Service list of collecting sites in central Oregon.
- BLM Sunstone Collection Area — directions and rules for the free sunstone site.
- A Description of Some Oregon Rocks and Minerals — the state geology department’s field booklet.
- USGS geologic units for Oregon — what rock type underlies a given area.
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 Oregon
These are the questions most people ask before a first Oregon trip.
What rare rocks can you find in Oregon?
Iridescent obsidian from Glass Butte, opalized wood, and blue or purple agates are all uncommon finds.
What rare minerals can you find in Oregon?
Oregon sunstone is the standout, and Owyhee blue opal is prized by collectors. Moonstone turns up on the Tillamook County beaches, nephrite jade near Brookings and amethyst in the Bohemia Mining District, but all three are rare finds.
What is the most famous rock or mineral found in Oregon?
Oregon sunstone, the state gemstone. Its glitter in sunlight, called schiller or “wink,” comes from tiny copper inclusions. The thunderegg, the state rock, is a close second.
Is it illegal to take rocks from a river in Oregon?
Not usually, but the limit depends on the stream. Essential Salmonid Habitat allows less than 1 cubic yard by hand at one site, and State Scenic Waterways need a permit for any amount.
Can you take rocks from Oregon beaches?
Yes. On the ocean shore you may take up to 1 gallon of agates and other non-living items, including fossils, per person per day, and no more than 3 gallons per year.
Can you find fossils in Oregon?
Yes. Fossil clams and snails occur in western Oregon, with most marine fossils around Vernonia and on the south-central coast, and Fischer Canyon gives leaf fossils. Shark teeth and other vertebrate fossils may not be collected on federal land.
Where is the best place to find agates in Oregon?
On the coast after winter storms. Depoe Bay, Beverly Beach, Moolack Beach, Gold Beach and Short Beach near Oceanside are among the best.
How much can I legally collect in Oregon?
It depends on the land: a reasonable personal amount under 250 lbs on BLM ground (petrified wood 25 lbs plus one piece per day), small amounts in national forests, and 1 gallon per day on the ocean shore. Hand tools only.
Conclusion
Oregon is one of the most generous rockhounding states in the country, with agate beaches that restock every winter, vast public land and a free sunstone collection area. Thundereggs, sunstone and Glass Butte obsidian make it worth the drive.
Plan around the seasons: the high desert is best in late spring and autumn, the coast right after winter storms.
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): 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 → |