Allanite and Marcasite Physical Properties

Allanite

Marcasite

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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

3.40-4.204.80-4.90

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

{010} Indistinct

1.7 Mohs Hardness

Not Available6-6.5

2 10

1.8 Chemical Composition

Not Available

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

Allanite and Marcasite Chemical Formula

While comparing Allanite and Marcasite 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 Allanite and Marcasite chemical formula.

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

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Allanite and Marcasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Allanite and Marcasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Allanite and Marcasite Optical Properties during the identification of gemstone. Specific gravity of Allanite is 4.80-4.90 whereas that of Marcasite is 4.80-4.90.