Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.1-3.55.9-6.3
1
7.18
👆🏻
Fracture
Granular
Conchoidal, Uneven
Cleavage
None
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Mohs Hardness
5-64.5-5
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Fe)Al 2(SiO 4)(Si 2O 7)(OH) 2 · H 2O)Arthur Thomas , Gemstones (2009)
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references