1 Physical Properties
1.2 Tenacity
Not Available
Not Available
1.5 Solubility
Not Available
Not Available
1.8 Durability
Not Available
Not Available
1.9 Specific Gravity
3.25-3.453.55-3.70
1
7.18
1.15 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Uneven
Gemstones (2009)
1.16 Cleavage
Good on {110}
Not Available
1.17 Mohs Hardness
1.18 Chemical Composition
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Al 2SiO 5Arthur Thomas , Gemstones (2009) More from other references