Vivianite and Crystal Opal Physical Properties

Vivianite

Crystal Opal

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.64-2.701.97-2.22

1 7.18

1.5 Fracture

(e.g. graphite).

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

{010} Perfect

Not Available

1.7 Mohs Hardness

Not Available5.5-6.5

2 10

1.8 Chemical Composition

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

SiO 2 + H 2OUlrich Henn and Claudio C.

Vivianite and Crystal Opal Chemical Formula

While comparing Vivianite and Crystal Opal 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 Crystal Opal chemical formula.

Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Chemical formula of Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Vivianite and Crystal Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vivianite and Crystal Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Crystal Opal Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 1.97-2.22 whereas that of Crystal Opal is 1.97-2.22.