Sillimanite and Cinnabar Physical Properties

Sillimanite

Cinnabar

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Physical Properties

Tenacity

Tough

Slightly sectile

Solubility

1.04 x 10⁻²⁵ g per 100 ml water (Ksp at 25°C = 2 x 10⁻³²)

Durability

Specific Gravity

3.20-3.262

1 7.18

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Fracture

Splintery

Uneven

Cleavage

{010} perfect

Prismatic {10 1 0}, perfect

Mohs Hardness

6-7.52-2.5

2 10

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Chemical Composition

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

HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Sillimanite and Cinnabar Chemical Formula

While comparing Sillimanite and Cinnabar 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 Cinnabar chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Blue Gemstones

Sillimanite Vs Tortoiseshell

Sillimanite Vs Verdite

Sillimanite Vs Violane

Sillimanite and Cinnabar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2 whereas that of Cinnabar is 2.