Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.44-2.623.25-3.35
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, ConchoidalWalter Schumann
Cleavage
Indiscernible
Perfect in three directions
Mohs Hardness
2.5-5.55
2
10
👆🏻
Chemical Composition
H 4Mg 3Si 2O 9Walter Schumann , Gemstones of the world (2001) More from other references
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references