Iolite and Fluorite Physical Properties

Iolite

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

2.6-2.73.00-3.25

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

3,1

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

1.7 Mohs Hardness

7-7.54

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

CaF₂

Iolite and Fluorite Chemical Formula

While comparing Iolite 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 Iolite and Fluorite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Fluorite- CaF₂

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Iolite and Fluorite Specific Gravity

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