Tenacity
-
Sectile
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.9-3.56.13
1
7.18
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Fracture
Conchoidal
Conchoidal
Cleavage
{110} Perfect, {???} Distinct, {???} Distinct
Distinct on {001} and {110}, indistinct on {100}
Mohs Hardness
5.5-62-3
2
10
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Chemical Composition
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references