Marcasite and Iolite Physical Properties

Marcasite

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

4.80-4.902.6-2.7

1 7.18

1.5 Fracture

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Uneven

Not Available

1.6 Cleavage

{010} Indistinct

3,1

1.7 Mohs Hardness

6-6.57-7.5

2 10

1.8 Chemical Composition

FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Mg₂Al₄Si₅O₁₈

Marcasite and Iolite Chemical Formula

While comparing Marcasite 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 Marcasite and Iolite chemical formula.

Chemical formula of Marcasite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Marcasite and Iolite Specific Gravity

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