Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.19-3.563.95-4.10
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven
Cleavage
{110} Perfect, {010} Indistinct
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
5.5-63.5-4
2
10
👆🏻
Chemical Composition
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references