Sillimanite and Moissanite Physical Properties

Sillimanite

Moissanite

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1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.263.17-3.24

1 7.18

1.5 Fracture

Splintery

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle

1.6 Cleavage

{010} perfect

(0001) indistinct

1.7 Mohs Hardness

6-7.59-9.5

2 10

1.8 Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

SiCArthur Thomas , Gemstones (2009)

Sillimanite and Moissanite Chemical Formula

While comparing Sillimanite and Moissanite 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 Sillimanite and Moissanite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Moissanite- SiCArthur Thomas , Gemstones (2009)

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Sillimanite and Moissanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Moissanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Moissanite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 3.17-3.24 whereas that of Moissanite is 3.17-3.24.