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Marcasite
Marcasite

Austinite
Austinite



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Marcasite
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Austinite

Marcasite and Austinite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Easily soluble in cold dilute HCl

Durability

-
-

Specific Gravity

4.80-4.904.12
1 7.18
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Fracture

Uneven
Uneven

Cleavage

{010} Indistinct
Good in two directions parallel to the prism faces {110}

Mohs Hardness

6-6.54-4.5
2 10
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Chemical Composition

FeS 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
CaZn(AsO4)(OH)

Marcasite and Austinite Chemical Formula

While comparing Marcasite and Austinite 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 Austinite chemical formula.

  • Chemical formula of Marcasite- FeS 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Austinite- CaZn(AsO4)(OH)

Marcasite and Austinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Marcasite and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Marcasite and Austinite Optical Properties during the identification of gemstone. Specific gravity of Marcasite is 4.12 whereas that of Austinite is 4.12.