1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.64-2.692.70-2.75
1
7.18
1.5 Fracture
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006)
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
Not Available
From the Greek for luster, for its pearly luster on the cleavage.
1.7 Mohs Hardness
1.8 Chemical Composition
SiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)