Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.85-6.152.74-2.76
1
7.18
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Fracture
Conchoidal
Uneven
Cleavage
Fair in four directions forming octahedrons
{010} Perfect, {001} Distinct
Mohs Hardness
3.5-43.5-4
2
10
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Chemical Composition
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)