Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.3923.25
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
{010} moderate, {100} imperfect
Imperfect in one direction
Mohs Hardness
6.5-75-5.5
2
10
👆🏻
Chemical Composition
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)