1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.74-2.903.355-3.433
1
7.18
1.5 Fracture
Uneven, Gemstones (2009), Splintery
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
1.6 Cleavage
Perfect on {100} and {001}
{???} Good, {???} Good
1.7 Mohs Hardness
1.8 Chemical Composition
Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.
(Ca,Mn2+ ,Fe2+ ) 3Al 2BSi 4O 15(OH)Anthony et al , Handbook of mineralogy (2001)