Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.1-3.53.95-4.10
1
7.18
👆🏻
Fracture
Granular
Uneven
Cleavage
None
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
5-63.5-4
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Fe)Al 2(SiO 4)(Si 2O 7)(OH) 2 · H 2O)Arthur Thomas , Gemstones (2009)
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references