Fayalite and Andalusite Physical Properties

Fayalite

Andalusite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.3923.05-3.21

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

{010} moderate, {100} imperfect

Good on {110}, poor on {100}

1.7 Mohs Hardness

6.5-77.5

2 10

1.8 Chemical Composition

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

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.

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

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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 and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Fayalite is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.