Pyrite Marcasite and Sillimanite Physical Properties

Pyrite Marcasite and Sillimanite Chemical Formula

While comparing Pyrite Marcasite 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 Pyrite Marcasite and Sillimanite chemical formula.

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• Chemical formula of Sillimanite- Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Pyrite Marcasite and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrite Marcasite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrite Marcasite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Pyrite Marcasite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.