1 Physical Properties
1.1 Tenacity
Not Available
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1.2 Solubility
Not Available
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1.3 Durability
Not Available
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1.4 Specific Gravity
1.5 Fracture
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001)
Uneven, Uneven, Gemstones of the world (2001) More from other references
1.6 Cleavage
{100} Perfect, {001} Perfect
Not Available
1.7 Mohs Hardness
1.8 Chemical Composition
Na(Mn2+ ,Ca) 2Si 3O 8(OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
Ca 10Mg 2Al 4(SiO 4) 5(Si 2O 7) 2(OH) 4Ulrich Henn and Claudio C.