Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.76-3.773.65-4.55
1
7.18
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Fracture
-
Conchoidal
Cleavage
{110} Perfect, {110} Perfect
None, but may exhibit slight parting
Mohs Hardness
5-67.5-8
2
10
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Chemical Composition
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)