Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.00-2.452.98-3.10
1
7.18
👆🏻
Fracture
Sub-Conchoidal, Conchoidal
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
none
[100] Perfect, [110] Good, [011] Distinct
Mohs Hardness
2-46
2
10
👆🏻
Chemical Composition
Cu2H2Si2O5(OH)4
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references