1 Physical Properties
1.1 Tenacity
Not Available
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1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
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1.4 Specific Gravity
1.5 Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect on {010} imperfect on {100}
Good in one direction
1.7 Mohs Hardness
1.8 Chemical Composition
Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
(Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references