Apatite and Turquoise Physical Properties

Apatite

Turquoise

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.232.30-2.90

1 7.18

1.5 Fracture

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

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

[0001] indistinct, [1010] indistinct

Good to perfect_usually N/A

1.7 Mohs Hardness

55-6

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

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

Apatite and Turquoise Chemical Formula

While comparing Apatite and Turquoise 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 Turquoise 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 Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O

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Apatite and Turquoise Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Turquoise Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Turquoise Optical Properties during the identification of gemstone. Specific gravity of Apatite is 2.30-2.90 whereas that of Turquoise is 2.30-2.90.