1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.74-2.903.30-3.40
1
7.18
1.5 Fracture
Uneven, Gemstones (2009), Splintery
Conchoidal, Brittle, Conchoidal
1.6 Cleavage
Perfect on {100} and {001}
{010} perfect, {110} distinct, {100} in traces
1.7 Mohs Hardness
1.8 Chemical Composition
Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references