1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.8 Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, Brittle, Conchoidal
1.9 Cleavage
None, but may exhibit slight parting
Good on [110] and on [001]
1.10 Mohs Hardness
1.11 Chemical Composition
MgAl2O4
[ ]Na2(Mg3Al2)Si8O22(OH)2