Iolite and Proustite Physical Properties

Iolite

Proustite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.75.51-5.64

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

3,1

Distinct on {10 1 1}

1.7 Mohs Hardness

7-7.52.5

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Ag 3AsS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Iolite and Proustite Chemical Formula

While comparing Iolite and Proustite 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 Proustite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Proustite- Ag 3AsS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Iolite and Proustite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Proustite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Proustite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 5.51-5.64 whereas that of Proustite is 5.51-5.64.