Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.80-4.152.60-2.64
1
7.18
👆🏻
Fracture
Uneven
Uneven, Splintery, Conchoidal
Cleavage
perfect along [010] and [100]
Absent
Mohs Hardness
3.5-46.5-7
2
10
👆🏻
Chemical Composition
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO 2Arthur Thomas , Gemstones (2009)