Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.74-2.763.43-3.44
1
7.18
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Fracture
Uneven
-
Cleavage
{010} Perfect, {001} Distinct
None Observed
Mohs Hardness
3.5-46.5-7
2
10
👆🏻
Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references