1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Brittle, Uneven, Brittle, Uneven
Not Available
1.6 Cleavage
Perfect on {001}, imperfect on {110}
Not Available
1.7 Mohs Hardness
1.8 Chemical Composition
(K,Na)Ca4Si8O20(F,OH)•8(H2O)
(Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)