Tenacity
Brittle
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.87-4.142.67-2.73
1
7.18
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Fracture
Subconchoidal, Conchoidal
Conchoidal
Cleavage
Poor on {120}, in traces on {001}
Perfect on [10 1 1] three directions with angle of 74° 55
Mohs Hardness
5.5-63
2
10
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Chemical Composition
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaCO 3Ulrich Henn and Claudio C.