Turquoise and Andalusite Physical Properties

Turquoise

Andalusite

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Physical Properties

Tenacity

Solubility

Soluble

Durability

Specific Gravity

2.30-2.903.05-3.21

1 7.18

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Fracture

Conchoidal

Uneven, Subconchoidal, Splintery

Cleavage

Good to perfect_usually N/A

Good on {110}, poor on {100}

Mohs Hardness

5-67.5

2 10

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Chemical Composition

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Turquoise and Andalusite Chemical Formula

While comparing Turquoise and Andalusite 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 Turquoise and Andalusite chemical formula.

Chemical formula of Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Turquoise and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Turquoise and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Turquoise and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Turquoise is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.