Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.253.65-4.55
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
Imperfect in one direction
None, but may exhibit slight parting
Mohs Hardness
5-5.57.5-8
2
10
👆🏻
Chemical Composition
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)