1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
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1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Uneven, Gemstones of the world (2001) More from other references
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
1.6 Cleavage
{001} Indistinct, {???} Indistinct
{010} moderate, {100} imperfect
1.7 Mohs Hardness
1.8 Chemical Composition
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)