Andalusite and Scheelite Physical Properties

Andalusite

Scheelite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.05-3.215.9-6.3

1 7.18

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Fracture

Uneven, Subconchoidal, Splintery

Conchoidal, Uneven

Cleavage

Good on {110}, poor on {100}

On {101}, distinct; on {112}, interrupted; on {001}, indistinct

Mohs Hardness

7.54.5-5

2 10

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Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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

Andalusite and Scheelite Chemical Formula

While comparing Andalusite and Scheelite 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 Andalusite and Scheelite chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Scheelite- CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Andalusite and Scheelite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Scheelite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Scheelite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 5.9-6.3 whereas that of Scheelite is 5.9-6.3.