Vivianite and Turquoise Physical Properties

Vivianite

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

2.64-2.70

2.30-2.90

1.5 Fracture

(e.g. graphite).

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

{010} Perfect

Good to perfect_usually N/A

1.7 Mohs Hardness

Not Available

5-6

1.8 Chemical Composition

Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

Vivianite and Turquoise Chemical Formula

While comparing Vivianite 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 Vivianite and Turquoise chemical formula.

Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Chemical formula of Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O

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Vivianite and Turquoise Specific Gravity

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