Apatite and Peridot Physical Properties

Apatite

Peridot

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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

3.16-3.231.54-1.55

1 7.18

1.5 Fracture

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

Conchoidal

1.6 Cleavage

[0001] indistinct, [1010] indistinct

Poor

1.7 Mohs Hardness

56.5-7

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

(Mg,Fe)₂SiO₄

Apatite and Peridot Chemical Formula

While comparing Apatite and Peridot 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 Peridot 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 Peridot- (Mg,Fe)₂SiO₄

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Apatite and Peridot Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Peridot Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Peridot Optical Properties during the identification of gemstone. Specific gravity of Apatite is 1.54-1.55 whereas that of Peridot is 1.54-1.55.