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
2.56-2.622.08-2.16
1
7.18
1.5 Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
Irregular/uneven, UnevenArthur Thomas, Gemstones (2009)
1.6 Cleavage
From the Greek for oblique and fracture, descriptive of the cleavage
distinct/good on {1011}
1.7 Mohs Hardness
1.8 Chemical Composition
(Na,K)AlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)