Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.83-3.892.9-3.5
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Conchoidal
Cleavage
Perfect on {01 1 1}
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
3.5-4.55.5-6
2
10
👆🏻
Chemical Composition
Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)