Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.373.95-4.10
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Good on (110)
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
5-63.5-4
2
10
👆🏻
Chemical Composition
NaCa2Mg5Si7AlO22(OH)2
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references