Turquoise and Vivianite Physical Properties

Turquoise

Vivianite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.30-2.902.64-2.70

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

(e.g. graphite).

1.6 Cleavage

Good to perfect_usually N/A

{010} Perfect

1.7 Mohs Hardness

5-6Not Available

2 10

1.8 Chemical Composition

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

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

Turquoise and Vivianite Chemical Formula

While comparing Turquoise and Vivianite 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 Vivianite chemical formula.

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

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Turquoise and Vivianite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Turquoise and Vivianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Turquoise and Vivianite Optical Properties during the identification of gemstone. Specific gravity of Turquoise is 2.64-2.70 whereas that of Vivianite is 2.64-2.70.