Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.25-3.503.30-3.50
1
7.18
👆🏻
Fracture
Uneven
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Distinct
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
-99995
2
10
👆🏻
Chemical Composition
Ca 10Mg 2Al 4(SiO 4) 5(Si 2O 7) 2(OH) 4Ulrich Henn and Claudio C.
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references