Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.74-2.763.89-4.18
1
7.18
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Fracture
Uneven
Conchoidal, Uneven
Cleavage
{010} Perfect, {001} Distinct
{0001}, {11 2 0} imperfect
Mohs Hardness
3.5-45.5
2
10
👆🏻
Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references