Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
1.54-1.55
2.30-2.90
Fracture
Conchoidal
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Cleavage
Poor
Good to perfect_usually N/A
Mohs Hardness
6.5-7
5-6
Chemical Composition
(Mg,Fe)2SiO4
CuAl6(PO4)4(OH)8 • 4H2O
