Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.76-3.772.59-2.60
1
7.18
👆🏻
Fracture
-
-
Cleavage
{110} Perfect, {110} Perfect
{001} Perfect, {110} Distinct, {101} Distinct
Mohs Hardness
5-66-7
2
10
👆🏻
Chemical Composition
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)