Dravite, Blue Sky Prospect, Santa Cruz Municipality, Sonora, Mexico

Dravite, also known as Brown Tourmaline, is a sodium magnesium member of the Tourmaline family. The origin of the name comes from the Drava River area in common day Slovenia, in which the stone was first reported back in 1884. Gustav Tschermak, who was a professor of Mineralogy and Petrography at the University of Vienna, coined the term “Dravite”.Its color ranges from dark brown, to a light brown-yellow with semi-translucent crystals. This specimen was found in 1989.