1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.74-2.901.98-2.50
1
7.18
1.8 Fracture
Uneven, Gemstones (2009), Splintery
Conchoidal, Conchoidal, Gemstones of the world (2001)
1.10 Cleavage
Perfect on {100} and {001}
Not Available
1.11 Mohs Hardness
1.12 Chemical Composition
Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)