Tenacity
Brittle
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
3.25-3.353.63-3.9
1
7.18
👆🏻
Fracture
Conchoidal, ConchoidalWalter Schumann
Conchoidal, Uneven
Cleavage
Perfect in three directions
Indistinct
Mohs Hardness
57.5-8
2
10
👆🏻
Chemical Composition
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references