Apatite and Marcasite Physical Properties

Apatite

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

3.16-3.234.80-4.90

1 7.18

1.5 Fracture

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven

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

1.6 Cleavage

[0001] indistinct, [1010] indistinct

{010} Indistinct

1.7 Mohs Hardness

56-6.5

2 10

1.8 Chemical Composition

Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

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

Apatite and Marcasite Chemical Formula

While comparing Apatite 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 Apatite and Marcasite chemical formula.

Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Marcasite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Apatite and Marcasite Specific Gravity

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