1 Physical Properties
1.1 Tenacity
1.2 Solubility
Gelatinises in acids
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Conchoidal, Brittle
Conchoidal, Conchoidal, Gemstones (2009), Uneven
1.6 Cleavage
Distinct on {110}
Perfect on { 2 01} fair on {010}
1.7 Mohs Hardness
1.13 Chemical Composition
(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2
Cu2CO3(OH)2