Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.503.95-4.10
1
7.18
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Fracture
Uneven, Conchoidal
Uneven
Cleavage
None
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
73.5-4
2
10
👆🏻
Chemical Composition
Mn 3B 7O 13ClMichael OâDonoghue , Gems, Sixth Edition (2006)
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references