Common Opal and Diaspore Physical Properties

Common Opal

Diaspore

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1 Physical Properties

1.1 Tenacity

Not Available

Very brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.503.30-3.40

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001)

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

Not Available

{010} perfect, {110} distinct, {100} in traces

1.7 Mohs Hardness

5.5-6.56.5-7

2 10

1.8 Chemical Composition

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Common Opal and Diaspore Chemical Formula

While comparing Common Opal and Diaspore 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 Common Opal and Diaspore chemical formula.

Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Compare Blue Gemstones

Common Opal Vs Diamond

Common Opal Vs Dumortierite

Common Opal Vs Dravite

Common Opal and Diaspore Specific Gravity

Another important criteria for qualitative analysis of gemstones is Common Opal and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Common Opal and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Common Opal is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.