1 Physical Properties
2.2 Tenacity
Not Available
Not Available
2.3 Solubility
Not Available
Not Available
2.4 Durability
Not Available
Not Available
2.6 Specific Gravity
2.9 Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
2.10 Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Not Available
2.11 Mohs Hardness
2.12 Chemical Composition
AlAl6O3BSi3O18
Ca 2 MgAl 2 BSi 4 O 15 OH Gemdat.org, Management Team (2012)