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Dravite: NaMg3Al6(BO3)3Si6O18(OH)4
Comments: Doubly terminated dravite crystal on white mica shist matrix. Location: Yinnietharra Station, Gascoyne, Western Australia. Scale: 4 x 4 x 2.9 cm. © Fabre Minerals
Comments: Greenish-brown chrome-rich dravite tourmaline crystals up to 13 mm long with complex terminations. Fluoresces mildly under UV illumination. Location: Shako Ranch, Mwatate Kabanga, Voi, Taita-Taveta district, Coast Province, Kenya. Scale: 14x13x10 mm. © John Betts - Fine Minerals