Diaspore and Sillimanite Physical Properties

Diaspore

Sillimanite

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1 Physical Properties

1.1 Tenacity

Very brittle

Tough

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.30-3.403.20-3.26

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal

Splintery

1.6 Cleavage

{010} perfect, {110} distinct, {100} in traces

{010} perfect

1.7 Mohs Hardness

6.5-76-7.5

2 10

1.8 Chemical Composition

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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

Diaspore and Sillimanite Chemical Formula

While comparing Diaspore 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 Diaspore and Sillimanite chemical formula.

Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Diaspore and Sillimanite Specific Gravity

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