List of Rocks
January 2024 - Aragonite
Locality: Santa Eulalia, Chihuahua, Mexico Chemical Formula: CaCO3 Mohs Hardness: 4 Aragonite is one of the crystal forms of calcium carbonate, and while we do find it on land in big...
January 2024 - Aragonite
Locality: Santa Eulalia, Chihuahua, Mexico Chemical Formula: CaCO3 Mohs Hardness: 4 Aragonite is one of the crystal forms of calcium carbonate, and while we do find it on land in big...
December 2023 - Eurypterid Parts
Locality: Bertie Formation Age: 415 to 422 Million Years Eurypterids, also known as sea scorpions, are pretty rare in the fossil record. But when we find them, we find lots of them....
December 2023 - Eurypterid Parts
Locality: Bertie Formation Age: 415 to 422 Million Years Eurypterids, also known as sea scorpions, are pretty rare in the fossil record. But when we find them, we find lots of them....
November 2023 - Peridot on Basalt
Peridot is the gemstone variety of olivine, a group of minerals that includes forsterite, fayalite, and others. Olivine can be found in volcanic rocks all around the world, because it’s...
November 2023 - Peridot on Basalt
Peridot is the gemstone variety of olivine, a group of minerals that includes forsterite, fayalite, and others. Olivine can be found in volcanic rocks all around the world, because it’s...
October 2023 - Montana Sapphires
These sapphires belong to the gemstone family corundum. They are chemically aluminum and oxygen, but their color is derived from inclusions of other elements—iron, gallium, and magnesium. Red corundum stones...
October 2023 - Montana Sapphires
These sapphires belong to the gemstone family corundum. They are chemically aluminum and oxygen, but their color is derived from inclusions of other elements—iron, gallium, and magnesium. Red corundum stones...