Fluorite and Andalusite Physical Properties

Fluorite

Andalusite

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Physical Properties

Tenacity

Brittle

Solubility

slightly water soluble and in hot hydrochloric acid

Durability

Specific Gravity

3.00-3.253.05-3.21

1 7.18

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Fracture

Subconchoidal, Uneven, ConchoidalWalter Schumann

Uneven, Subconchoidal, Splintery

Cleavage

Octahedral, perfect on {111}, parting on {011}

Good on {110}, poor on {100}

Mohs Hardness

47.5

2 10

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Chemical Composition

CaF₂

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

Fluorite and Andalusite Chemical Formula

While comparing Fluorite 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 Fluorite and Andalusite chemical formula.

Chemical formula of Fluorite- CaF₂
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Fluorite and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fluorite and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fluorite and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Fluorite is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.