Iolite and Pyrope Physical Properties

Iolite

Pyrope

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

insoluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.73.62-3.87

1 7.18

1.5 Fracture

Not Available

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

3,1

None

1.7 Mohs Hardness

7-7.57-7.5

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

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

Iolite and Pyrope Chemical Formula

While comparing Iolite and Pyrope 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 Pyrope chemical formula.

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

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Iolite and Pyrope Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Pyrope Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Pyrope Optical Properties during the identification of gemstone. Specific gravity of Iolite is 3.62-3.87 whereas that of Pyrope is 3.62-3.87.