Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.90-3.023.04-3.17
1
7.18
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Fracture
Subconchoidal, Conchoidal
Uneven
Cleavage
Indistinct on {110}
{001} Indistinct, {???} Indistinct
Mohs Hardness
5-5.55.5
2
10
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Chemical Composition
CaBePO 4(F,OH)Ulrich Henn and Claudio C.
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references