Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.9-3.54.32-4.48
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Subconchoidal, Conchoidal
Cleavage
{110} Perfect, {???} Distinct, {???} Distinct
{101}, good; {010}, poor
Mohs Hardness
5.5-63.5
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)