Topazolite and Opal Physical Properties

Topazolite

Opal

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1 Physical Properties

1.1 Tenacity

Not Available

BrittleWalter Schumann

1.2 Solubility

Not Available

hot salt water

1.3 Durability

Not Available

1.4 Specific Gravity

3.70-4.10

1.98-2.25

1.5 Fracture

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

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

1.6 Cleavage

Not Available

None

1.7 Mohs Hardness

6.5-7

5-6.5

1.8 Chemical Composition

Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

SiO₂ · nH₂O

Topazolite and Opal Chemical Formula

While comparing Topazolite 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 Topazolite and Opal chemical formula.

Chemical formula of Topazolite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Opal- SiO₂ · nH₂O

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Topazolite and Opal Specific Gravity

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