Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.63-3.93.70-3.90
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Conchoidal
Cleavage
Indistinct
Perfect on {011}, fair on {100}, poor on {110}
Mohs Hardness
7.5-83.5-4
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references