Take a walk down the mineralogy collection of any good natural history museum and your face will be aglow with the sparkle of minerals, crystals ... such as that classic rock diamond, but there ...

Large crystals found in geodes and other rocks are relatively rare. Pink ChalcedonyA pink chalcedony shows off its beauty. Chalcedonies include many types of cryptocrystalline quartz gems and ...

An "amazing" new type of mineral has been discovered by scientists analysing a rock mined in Cornwall about ... For centuries, mineralogists believed the green crystals to be a variation of ...