Tenacity
Sectile
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.062.90-2.98
1
7.18
👆🏻
Fracture
Sectile
Conchoidal, ConchoidalWalter Schumann
Cleavage
Perfect on {010}; poor on {100} and { 1 02}.
Distinct on {11 2 0}, imperfect on {10 1 1}
Mohs Hardness
-99997.5-8
2
10
👆🏻
Chemical Composition
Co3(AsO4)2•8(H2O)
Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references