1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.4 Durability
Not Available
Not Available
1.6 Specific Gravity
1.16 Fracture
Brittle, Uneven, Brittle, Uneven
Conchoidal, Conchoidal, Gemstones of the world (2001)
1.17 Cleavage
Perfect on {001}
Not Available
1.18 Mohs Hardness
1.19 Chemical Composition
NaCa16Si23AlO60(OH)8•64(H2O)
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)