Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.90-3.023.30-3.50
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Indistinct on {110}
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
5-5.55
2
10
👆🏻
Chemical Composition
CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references