Vanadinite and Sillimanite Physical Properties

Vanadinite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Brittle

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.8-7.13.20-3.26

1 7.18

1.5 Fracture

Uneven, Conchoidal, Brittle

Splintery

1.6 Cleavage

None

{010} perfect

1.7 Mohs Hardness

3-46-7.5

2 10

1.8 Chemical Composition

C20H36

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

Vanadinite and Sillimanite Chemical Formula

While comparing Vanadinite 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 Vanadinite and Sillimanite chemical formula.

Chemical formula of Vanadinite- C20H36
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Vanadinite and Sillimanite Specific Gravity

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