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 ...

Today, gems known as Paraiba tourmalines come from ... Pomellato’s striking Barocco necklace combines a large free-form Paraiba tourmaline centrepiece in a kaleidoscope of hues courtesy of ...