Tenacity
Brittle
Brittle
Solubility
Effervesces in hot HCl
-
Durability
-
-
Specific Gravity
2.92-3.125.00-5.30
1
7.18
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Fracture
Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
[10 1 1] perfect
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
3.5-4.56
2
10
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Chemical Composition
MgCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Fe 2O 3Arthur Thomas , Gemstones (2009)