Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.74-2.762.70-2.75
1
7.18
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Fracture
Uneven
Conchoidal
Cleavage
{010} Perfect, {001} Distinct
From the Greek for luster, for its pearly luster on the cleavage.
Mohs Hardness
3.5-44.5-5
2
10
👆🏻
Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)