Andalusite and Fluorite Physical Properties

Andalusite

Fluorite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

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

Brittle

slightly water soluble and in hot hydrochloric acid

3.00-3.25

Subconchoidal, Uneven, ConchoidalWalter Schumann

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

CaF₂

Andalusite and Fluorite Chemical Formula

While comparing Andalusite and Fluorite 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 Fluorite chemical formula.

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Andalusite and Fluorite Specific Gravity

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