Dumortierite and Apatite Physical Properties

Dumortierite

Apatite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.26-3.413.16-3.23

1 7.18

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Fracture

Fibrous, ConchoidalWalter Schumann

Conchoidal, Uneven, Conchoidal to uneven

Cleavage

Distinct on {100}, poor on {110}; parting on {001}

[0001] indistinct, [1010] indistinct

Mohs Hardness

7-8.55

2 10

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Chemical Composition

AlAl₆O₃BSi₃O₁₈

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

Dumortierite and Apatite Chemical Formula

While comparing Dumortierite and Apatite 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 Dumortierite and Apatite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

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Dumortierite and Apatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dumortierite and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Apatite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 3.16-3.23 whereas that of Apatite is 3.16-3.23.