Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.80-4.152.82
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
perfect along [010] and [100]
Perfect in one direction, indistinct in one direction
Mohs Hardness
3.5-46
2
10
👆🏻
Chemical Composition
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
K2Na(Ca,Mn)2Ti[O|Si7O18(OH)]