Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.3922.9-3.5
1
7.18
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Fracture
Conchoidal
Conchoidal
Cleavage
{010} moderate, {100} imperfect
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
6.5-75.5-6
2
10
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Chemical Composition
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)