Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.90-3.022.60-2.64
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven, Splintery, Conchoidal
Cleavage
Indistinct on {110}
Absent
Mohs Hardness
5-5.56.5-7
2
10
👆🏻
Chemical Composition
CaBePO 4(F,OH)Ulrich Henn and Claudio C.
SiO 2Arthur Thomas , Gemstones (2009)