Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.645.85-6.15
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Conchoidal
Cleavage
Absent
Fair in four directions forming octahedrons
Mohs Hardness
6.5-73.5-4
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references