1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.64-3.661.98-2.50
1
7.18
1.5 Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, Conchoidal, Gemstones of the world (2001)
1.6 Cleavage
None, but may exhibit slight parting
Not Available
1.7 Mohs Hardness
1.13 Chemical Composition
MgAl2O4
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)