Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.74-2.763.70-3.90
1
7.18
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Fracture
Uneven
Conchoidal
Cleavage
{010} Perfect, {001} Distinct
Perfect on {011}, fair on {100}, poor on {110}
Mohs Hardness
3.5-43.5-4
2
10
👆🏻
Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references