1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.74-2.903.90-4.00
1
7.18
1.5 Fracture
Uneven, Gemstones (2009), Splintery
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
Perfect on {100} and {001}
Perfect on {001}, good on {210}, poor on {010}
1.7 Mohs Hardness
1.8 Chemical Composition
Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references