Kutnohorite and Sillimanite Physical Properties

Kutnohorite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Brittle

Tough

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.123.20-3.26

1 7.18

1.5 Fracture

Subconchoidal, Brittle, Conchoidal

Splintery

1.6 Cleavage

Perfect on {10 1 1}

{010} perfect

1.7 Mohs Hardness

3-46-7.5

2 10

1.8 Chemical Composition

Not Available

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

Kutnohorite and Sillimanite Chemical Formula

While comparing Kutnohorite 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 Kutnohorite and Sillimanite chemical formula.

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

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Kutnohorite and Sillimanite Specific Gravity

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