Marcasite and Fluorite Physical Properties

Marcasite

Fluorite

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Physical Properties

Tenacity

Brittle

Solubility

slightly water soluble and in hot hydrochloric acid

Durability

Specific Gravity

4.80-4.903.00-3.25

1 7.18

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Fracture

Uneven

Subconchoidal, Uneven, ConchoidalWalter Schumann

Cleavage

{010} Indistinct

Octahedral, perfect on {111}, parting on {011}

Mohs Hardness

6-6.54

2 10

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Chemical Composition

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

CaF₂

Marcasite and Fluorite Chemical Formula

While comparing Marcasite and Fluorite 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 Fluorite chemical formula.

Chemical formula of Marcasite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Fluorite- CaF₂

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Marcasite and Fluorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Marcasite and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Marcasite and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Marcasite is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.