Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.50-5.902.90-3.02
1
7.18
👆🏻
Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
On {10 1 0}, perfect; parting on {000 1 }
Indistinct on {110}
Mohs Hardness
45-5.5
2
10
👆🏻
Chemical Composition
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
CaBePO 4(F,OH)Ulrich Henn and Claudio C.