Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.55-2.633.50-3.60
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
{001} Perfect, {010} Good
Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}
Mohs Hardness
6-6.56
2
10
👆🏻
Chemical Composition
KAlSi 3O 8Arthur Thomas , Gemstones (2009)
(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.