Andalusite and Fluorite Physical Properties

Andalusite

Fluorite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

slightly water soluble and in hot hydrochloric acid

1.3 Durability

Not Available

1.4 Specific Gravity

3.05-3.213.00-3.25

1 7.18

1.5 Fracture

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

Subconchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

1.6 Cleavage

Good on {110}, poor on {100}

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

1.7 Mohs Hardness

7.54

2 10

1.8 Chemical Composition

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

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.

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

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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 and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.