Hercynite and Turquoise Physical Properties

Hercynite

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

4.392.30-2.90

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

{111} Indistinct, {111} Indistinct, {111} Indistinct

Good to perfect_usually N/A

1.7 Mohs Hardness

7.5-85-6

2 10

1.8 Chemical Composition

Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

Hercynite and Turquoise Chemical Formula

While comparing Hercynite 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 Hercynite and Turquoise chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O

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Hercynite and Turquoise Specific Gravity

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