Colemanite and Sillimanite Physical Properties

Colemanite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Not Available

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.40-2.423.20-3.26

1 7.18

1.5 Fracture

Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic

Splintery

1.6 Cleavage

{010} Perfect, {001} Distinct

{010} perfect

1.7 Mohs Hardness

4.56-7.5

2 10

1.8 Chemical Composition

Ca 2B 6O 11 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Colemanite and Sillimanite Chemical Formula

While comparing Colemanite 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 Colemanite and Sillimanite chemical formula.

Chemical formula of Colemanite- Ca 2B 6O 11 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Colorless Gems

Colemanite Vs Datolite

Colemanite Vs Diaspore

Colemanite Vs Cubic Zirconia

Colemanite and Sillimanite Specific Gravity

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