Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.643.25
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
-
Cleavage
Absent
Imperfect in one direction
Mohs Hardness
6.5-75-5.5
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)