Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-3.023.95-4.10
1
7.18
👆🏻
Fracture
-
Uneven
Cleavage
Perfect
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
-99993.5-4
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ ) 5Al(Si 3Al)O 10(OH) 8Anthony et al , Handbook of mineralogy (2001)
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references