Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.79-3.942.9-3.5
1
7.18
👆🏻
Fracture
Lamellar, Splintery
Conchoidal
Cleavage
{100} Good, {001} Good, {010} Poor
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
45.5-6
2
10
👆🏻
Chemical Composition
FeAs
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)