1 Physical Properties
1.2 Tenacity
1.4 Solubility
Not Available
Not Available
1.5 Durability
Not Available
Not Available
1.6 Specific Gravity
1.98-2.503.90-4.00
1
7.18
1.7 Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.8 Cleavage
Not Available
Perfect on {001}, good on {210}, poor on {010}
1.9 Mohs Hardness
1.10 Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references