Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.9-3.53.30-3.50
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
{110} Perfect, {???} Distinct, {???} Distinct
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
5.5-65
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references