1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.8 Solubility
1.9 Durability
Not Available
Not Available
1.10 Specific Gravity
1.11 Fracture
Conchoidal, Brittle, Conchoidal
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
1.12 Cleavage
Good on [110] and on [001]
Good to perfect_usually N/A
1.13 Mohs Hardness
1.14 Chemical Composition
[ ]Na2(Mg3Al2)Si8O22(OH)2
CuAl6(PO4)4(OH)8 • 4H2O