Iolite and Melanite Physical Properties

Iolite

Melanite

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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

2.6-2.73.70-4.10

1 7.18

1.5 Fracture

Not Available

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

3,1

Not Available

1.7 Mohs Hardness

7-7.56.5-7

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

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

Iolite and Melanite Chemical Formula

While comparing Iolite and Melanite 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 Melanite chemical formula.

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

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Iolite and Melanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Melanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Melanite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 3.70-4.10 whereas that of Melanite is 3.70-4.10.