Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.74-2.764.95-5.0
1
7.18
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Fracture
Uneven
Uneven
Cleavage
{010} Perfect, {001} Distinct
Imperfect to indistinct on {10 1 0}, parting on {0001}
Mohs Hardness
3.5-44-5
2
10
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Chemical Composition
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references