Smokey Quartz Cluster, from Brazil (No.148)

Smokey Quartz is variety of Quartz, a silicon dioxide mineral. Like other Quartz crystals, Smokey Quartz has a hexagonal (trigonal) crystal system and forms in prisms.

It can vary in colour from very pale tan to a deep chocolate brown, its colour comes from natural irradiation.

Smokey Quartz can be found in many countries, including Brazil, Australia, Madagascar, Switzerland and the USA.