Sillimanite and Ekanite Physical Properties

Sillimanite

Ekanite

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1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.263.28-3.32

1 7.18

1.5 Fracture

Splintery

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

1.6 Cleavage

{010} perfect

{101} Distinct

1.7 Mohs Hardness

6-7.56-6.5

2 10

1.8 Chemical Composition

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

ThCa 2Si 8O 20Walter Schumann , Gemstones of the world (2001) More from other references

Sillimanite and Ekanite Chemical Formula

While comparing Sillimanite and Ekanite 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 Ekanite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Ekanite- ThCa 2Si 8O 20Walter Schumann , Gemstones of the world (2001) More from other references

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Sillimanite and Ekanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Ekanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Ekanite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 3.28-3.32 whereas that of Ekanite is 3.28-3.32.