Tenacity
-
Sectile
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.74-2.766.13
1
7.18
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Fracture
Uneven
Conchoidal
Cleavage
{010} Perfect, {001} Distinct
Distinct on {001} and {110}, indistinct on {100}
Mohs Hardness
3.5-42-3
2
10
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Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references