Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.816.50-7.00
1
7.18
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Fracture
Conchoidal
Irregular, Conchoidal
Cleavage
{001} Perfect
On {011}, distinct; on {001}, {013}, indistinct
Mohs Hardness
4.5-53
2
10
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Chemical Composition
NaAl 3(PO 4) 2(OH) 4 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
PbMoO 4Walter Schumann , Gemstones of the world (2001)