Almandine and Fluorite Physical Properties

Almandine

Fluorite

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Physical Properties

Tenacity

Brittle

Solubility

slightly water soluble and in hot hydrochloric acid

Durability

Specific Gravity

3.95-4.303.00-3.25

1 7.18

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Fracture

Conchoidal

Subconchoidal, Uneven, ConchoidalWalter Schumann

Cleavage

none

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

Mohs Hardness

7-7.54

2 10

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Chemical Composition

Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

CaF₂

Almandine and Fluorite Chemical Formula

While comparing Almandine 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 Almandine and Fluorite chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Fluorite- CaF₂

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Almandine and Fluorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.