Physical Properties
Tenacity
Brittle
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.67-2.73
2.42-2.58
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Conchoidal, Splintery, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle
Cleavage
Perfect on [10 1 1] three directions with angle of 74° 55
[010] perfect
Mohs Hardness
3
4-5
Chemical Composition
CaCO 3Ulrich Henn and Claudio C.
AlPO4 · 2(H2O)
