1 Physical Properties
1.1 Tenacity
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1.2 Solubility
Not Available
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1.3 Durability
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1.4 Specific Gravity
1.5 Fracture
Not Available
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
1.6 Cleavage
Not Available
{100} Perfect, {110} Good, {011} Distinct
1.7 Mohs Hardness
1.8 Chemical Composition
(Mg,Fe) 2Si 2O 6Ulrich Henn and Claudio C.
LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references