Marcasite and Dravite Physical Properties

Marcasite

Dravite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

4.80-4.90

Uneven

{010} Indistinct

6-6.5

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

3.03-3.18

Uneven, Irregular, Conchoidal

{???} Indistinct

7-7.5

Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Marcasite and Dravite Chemical Formula

While comparing Marcasite and Dravite 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 Dravite chemical formula.

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Marcasite and Dravite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Marcasite and Dravite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Marcasite Vs Dravite during the identification of gemstone. Specific gravity of Marcasite is whereas that of Dravite is .