Almandine and Iolite Physical Properties

Almandine

Iolite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.30

2.6-2.7

1.5 Fracture

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Not Available

1.6 Cleavage

none

3,1

1.7 Mohs Hardness

7-7.5

1.8 Chemical Composition

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

Mg₂Al₄Si₅O₁₈

Almandine and Iolite Chemical Formula

While comparing Almandine and Iolite 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 Iolite chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Almandine and Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Iolite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 2.6-2.7 whereas that of Iolite is 2.6-2.7.