Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.252.60-2.64
1
7.18
👆🏻
Fracture
-
Uneven, Splintery, Conchoidal
Cleavage
Imperfect in one direction
Absent
Mohs Hardness
5-5.56.5-7
2
10
👆🏻
Chemical Composition
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
SiO 2Arthur Thomas , Gemstones (2009)