Noun
dravite
(mineralogy) A trigonal-ditrigonal pyramidal mineral containing aluminum, boron, hydrogen, magnesium, oxygen, silicon, and sodium.
Dravite species such as green chromium dravite and brown dravite are diamagnetic. Source: Internet
Dravite Black Dravite on a grey matrix Dravite, also called brown tourmaline, is the sodium magnesium rich tourmaline endmember. Source: Internet
Dravite forms multiple series, with other tourmaline members, including schorl and elbaite. Source: Internet
An exception was the fine dravite tourmalines of Yinnietharra, in western Australia. Source: Internet