Iolite and Gahnospinel Physical Properties

Iolite

Gahnospinel

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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

2.6-2.73.65-4.55

1 7.18

1.5 Fracture

Not Available

ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

3,1

None, but may exhibit slight parting

1.7 Mohs Hardness

7-7.57.5-8

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)

Iolite and Gahnospinel Chemical Formula

While comparing Iolite and Gahnospinel 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 Gahnospinel chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Gahnospinel- (Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)

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Iolite and Gahnospinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Gahnospinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Gahnospinel Optical Properties during the identification of gemstone. Specific gravity of Iolite is 3.65-4.55 whereas that of Gahnospinel is 3.65-4.55.