Cassiterite and Sillimanite Physical Properties

Cassiterite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Brittle

Tough

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.86-7.033.20-3.26

1 7.18

1.5 Fracture

Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Irregular

Splintery

1.6 Cleavage

{100} imperfect, {110} indistinct; partings on {111} or {011}

{010} perfect

1.7 Mohs Hardness

6-76-7.5

2 10

1.8 Chemical Composition

SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Cassiterite and Sillimanite Chemical Formula

While comparing Cassiterite 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 Cassiterite and Sillimanite chemical formula.

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

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Cassiterite and Sillimanite Specific Gravity

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