Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.95-4.102.69-2.72
1
7.18
👆🏻
Fracture
Uneven
Uneven, Conchoidal
Cleavage
{110} Perfect, {110} Perfect, {110} Perfect
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
Mohs Hardness
3.5-46-6.5
2
10
👆🏻
Chemical Composition
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Na,Ca)1-2Si3-2O8