1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.50-3.602.77-2.88
1
7.18
1.5 Fracture
Uneven, Brittle, Metallic, Brittle, Metallic, Brittle, Metallic
Uneven
1.6 Cleavage
Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}
Perfect basal
1.7 Mohs Hardness
1.8 Chemical Composition
(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.
K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)