1 Physical Properties
1.1 Tenacity
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1.3 Solubility
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1.5 Durability
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1.6 Specific Gravity
1.7 Fracture
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
1.8 Cleavage
1.9 Mohs Hardness
1.13 Chemical Composition
Ca 9(Mg,Fe2+ )(PO 4) 6(PO 3OH)Anthony et al , Handbook of mineralogy (2001)
BaSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references