Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.34-2.512.25-2.40
1
7.18
👆🏻
Fracture
-
-
Cleavage
None
perfect on {010}; good on {100}
Mohs Hardness
-99995-5.5
2
10
👆🏻
Chemical Composition
SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O
NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references