IMA mineral species

Oxy-dravite

Na(Al₂Mg)(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃O

Tourmaline mineral.

Oxy-dravite specimen — Dutrowite in plane-polarized light.png · Wikimedia Commons (see file page for author & license)

Properties

⛏ Mohs hardness7

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Harder than quartz: scratches glass and steel.

Chemical formula	Na(Al₂Mg)(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃O
Elements	Na, Al, Mg, Si, O, B, H
Crystal system	Trigonal
Mohs hardness	7
Density	—
Streak	—
Color	—
IMA symbol	Odrv
Nickel–Strunz class	9.CK.05

“—” means no reliable value in Wikidata yet. Check Mindat for full data.

Learn more

Oxy-dravite on Mindat.org
Wikidata item Q19861121 (source of this page's data – you can correct it there)