Calcite and Sillimanite Physical Properties
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.67-2.73
3.20-3.26
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Splintery
Cleavage
Perfect on [10 1 1] three directions with angle of 74° 55
{010} perfect
Chemical Composition
CaCO 3Ulrich Henn and Claudio C.
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Calcite and Sillimanite Chemical Formula
While comparing Calcite and Sillimanite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Calcite and Sillimanite chemical formula.
- Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Calcite and Sillimanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Calcite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Calcite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.