Precious Opal and Diaspore Physical Properties

Precious 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

1.98-2.253.30-3.40

1 7.18

1.5 Fracture

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

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

Not Available

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

1.7 Mohs Hardness

5-6.56.5-7

2 10

1.8 Chemical Composition

SiO 2 · nH 2OGemdat.org , Management Team (2012)

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

Precious Opal and Diaspore Chemical Formula

While comparing Precious 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 Precious Opal and Diaspore chemical formula.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Compare Blue Gemstones

Precious Opal Vs Sardonyx

Precious Opal Vs Sapphire

Precious Opal Vs Sard

Precious Opal and Diaspore Specific Gravity

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