Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.62-3.683.1-3.2
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
Distinct
Vitreous, pearly on cleavage
Mohs Hardness
8-8.53-4
2
10
👆🏻
Chemical Composition
(Mg,Fe,Zn)Al 6BeO 12Ulrich Henn and Claudio C.
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references