8 Factors Why Opal is Valuable (Prices for Different Types)
Opal is a one-of-a-kind, highly valuable gemstone. Saying just “highly praised” and “extremely valuable” is not enough to describe how beautiful opal is. Its intriguing …
Facts
8 Minerals That Show Double Refraction (+ Explanation Why)
Double refraction or birefringence is a typical physical property for a lot of minerals. Minerals and gemstones which crystalize in any other crystal system except …
21 Rocks What Explode & Won’t Explode When Heated (+ Why)
Rocks can explode when heated. This statement should be convincing enough not to boil rocks, place them into the oven or inside the fireplace. That …
11 Cool & Interesting Facts About Igneous Rocks (Must Read)
Igneous rocks are an integral part of all rocks that make up our planet; that is why there are a lot of interesting facts to …
Holes in Rocks Explained: How Are Formed & What Causes Them
Holes in rocks can be formed in strikingly different ways. Sometimes holes are a result of water erosion – the simplest and the most obvious …
Sailing Stones Explained: Why & How Do They Move? (7 Facts)
Can you imagine 300 kg of rock moving in a desert and leaving tracks behind without any help? Sounds ridiculous. But it has a rational …