Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.76-3.772.90-3.40
1
7.18
👆🏻
Fracture
-
Uneven, ConchoidalWalter Schumann
Cleavage
{110} Perfect, {110} Perfect
Indiscernible
Mohs Hardness
5-67-7.5
2
10
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Chemical Composition
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.