Vesuvianite and Opal Physical Properties

Vesuvianite

Opal

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1 Physical Properties

1.1 Tenacity

Not Available

BrittleWalter Schumann

1.2 Solubility

Vesuvianite is virtually insolouble in acids

hot salt water

1.3 Durability

Not Available

1.4 Specific Gravity

3.32-3.431.98-2.25

1 7.18

1.5 Fracture

Conchoidal, Brittle

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle

1.6 Cleavage

Poor on {110} and {100} very poor on {001}

None

1.7 Mohs Hardness

6-75-6.5

2 10

1.8 Chemical Composition

Not Available

SiO₂ · nH₂O

Vesuvianite and Opal Chemical Formula

While comparing Vesuvianite and 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 Vesuvianite and Opal chemical formula.

Chemical formula of Opal- SiO₂ · nH₂O

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Vesuvianite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vesuvianite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vesuvianite and Opal Optical Properties during the identification of gemstone. Specific gravity of Vesuvianite is 1.98-2.25 whereas that of Opal is 1.98-2.25.