Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.65-4.553.70-3.90
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
None, but may exhibit slight parting
Perfect on {011}, fair on {100}, poor on {110}
Mohs Hardness
7.5-83.5-4
2
10
👆🏻
Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references