Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.60-3.613.1
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
Imperfect/fair/absent
Perfect {010} imperfect {100}
Mohs Hardness
8-8.56-7
2
10
👆🏻
Chemical Composition
Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references
Ca2Al3(SiO4)3(OH)