1 Physical Properties
2.1 Tenacity
Not Available
Not Available
2.3 Solubility
2.6 Durability
Not Available
Not Available
2.8 Specific Gravity
3.25-3.45Not Available
1
7.18
2.9 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Uneven
Not Available
2.11 Cleavage
Good on {110}
Not Available
2.13 Mohs Hardness
2.15 Chemical Composition
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Not Available