Beryllonite and Sillimanite Physical Properties

Beryllonite

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

2.79-2.873.20-3.26

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Splintery

1.6 Cleavage

{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces

{010} perfect

1.7 Mohs Hardness

5.5-66-7.5

2 10

1.8 Chemical Composition

NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Beryllonite and Sillimanite Chemical Formula

While comparing Beryllonite 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 Beryllonite and Sillimanite chemical formula.

Chemical formula of Beryllonite- NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Colorless Gems

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Beryllonite and Sillimanite Specific Gravity

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