Sard and Sillimanite Physical Properties

Sard

Sillimanite

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1 Physical Properties

1.1 Tenacity

Not Available

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.58-2.63

3.20-3.26

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

Splintery

1.6 Cleavage

Not Available

{010} perfect

1.7 Mohs Hardness

6.5-7

6-7.5

1.8 Chemical Composition

SiO 2Ulrich Henn and Claudio C.

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

Sard and Sillimanite Chemical Formula

While comparing Sard 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 Sard and Sillimanite chemical formula.

Chemical formula of Sard- SiO 2Ulrich Henn and Claudio C.
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

Sard Vs Sillimanite

Sard Vs Spinel

Sard Vs Sodalite

Sard and Sillimanite Specific Gravity

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