Most people know some very basic information about minerals, crystals, and gemstones, but likely wouldn’t be sure about what ...

Minerals are chemical compounds which occur ... Chalk, limestone, shale, and sandstone are all examples of sedimentary rocks. All these different sedimentary rocks are formed from the broken ...

More than 4,000 naturally occurring minerals ... and other rocks are relatively rare. Pink ChalcedonyA pink chalcedony shows off its beauty. Chalcedonies include many types of cryptocrystalline ...

Different minerals, like aragonite (CaCO3) and calcite (CaCO3), can have the same chemical ... because we're exploring areas that might have conditions we didn't know about," Anderson said. There are ...