Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.50-3.603.76-3.77
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}
{110} Perfect, {110} Perfect
Mohs Hardness
65-6
2
10
👆🏻
Chemical Composition
(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.