Diamond and Sillimanite Physical Properties

Diamond

Sillimanite

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1 Physical Properties

1.1 Tenacity

Not Available

Tough

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.50-3.533.20-3.26

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

Splintery

1.6 Cleavage

111 (perfect in four directions)

{010} perfect

1.7 Mohs Hardness

106-7.5

2 10

1.8 Chemical Composition

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

Diamond and Sillimanite Chemical Formula

While comparing Diamond 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 Diamond and Sillimanite chemical formula.

Chemical formula of Diamond- C
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Diamond and Sillimanite Specific Gravity

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