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Formula: Na(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O
Cyclosilicate (ring silicate), borosilicate,
tourmaline group,
Crystal System: Trigonal
Specific gravity: 3.073 calculated
Hardness: 7
Streak: Pink
Colour: Brown, brown-black, red-black
Environments
Oxy-dravite was approved in 2012.
Localities
At the type locality:ⓘ Osarara, Narok County, Kenya, the holotype specimen occurs in
quartz-muscovite
schist. Crystals of oxy-dravite are dark red, partially
translucent with a vitreous lustre, a pink streak and conchoidal fracture
(AM 98.1442-1448).
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