Fayalite and Andalusite Physical Properties

Fayalite

Andalusite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

4.392

Conchoidal

{010} moderate, {100} imperfect

6.5-7

Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

3.05-3.21

Uneven, Subconchoidal, Splintery

Good on {110}, poor on {100}

7.5

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

Fayalite and Andalusite Chemical Formula

While comparing Fayalite and Andalusite 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 Fayalite and Andalusite chemical formula.

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Fayalite and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fayalite and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fayalite Vs Andalusite during the identification of gemstone. Specific gravity of Fayalite is whereas that of Andalusite is .