Apatite and Dumortierite Physical Properties

Apatite

Dumortierite

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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

3.16-3.23

3.26-3.41

1.5 Fracture

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

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

1.6 Cleavage

[0001] indistinct, [1010] indistinct

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

1.7 Mohs Hardness

7-8.5

1.8 Chemical Composition

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

AlAl₆O₃BSi₃O₁₈

Apatite and Dumortierite Chemical Formula

While comparing Apatite and Dumortierite 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 Dumortierite 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 Dumortierite- AlAl₆O₃BSi₃O₁₈

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Apatite and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.