Highlights: Axinite is considered a rare mineral from the borosilicate ... The fire opal is rarer than other types of opal, especially in gem-quality stones. While the background of a fire opal ...

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 ...

You could say she’s a rare gem, no pun intended, that will be hard to replace. Gaylene Lindell stands near a jewelry case at Gaylene’s, 3045 Fulvanna Ave. Lindell will be retiring and closing ...

Tanzanite is only found in northern Tanzania and is used to make ornaments. It is one of the rarest gemstones on Earth, and one local geologist estimates its supply may be entirely depleted within ...

An curved arrow pointing right. Almost every gemstone in the world can be found in deep underground pits in Sri Lanka, a country renowned for its colored sapphires. But mining for the gems is ...