Precious Opal and Cuprite Physical Properties

Precious Opal

Cuprite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.255.85-6.15

1 7.18

1.5 Fracture

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

Conchoidal, Metallic, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

Not Available

Fair in four directions forming octahedrons

1.7 Mohs Hardness

5-6.53.5-4

2 10

1.8 Chemical Composition

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

Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Precious Opal and Cuprite Chemical Formula

While comparing Precious Opal and Cuprite 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 Cuprite chemical formula.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Chemical formula of Cuprite- Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Blue Gemstones

Precious Opal Vs Sardonyx

Precious Opal Vs Sard

Precious Opal Vs Sapphire

Precious Opal and Cuprite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Precious Opal and Cuprite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Cuprite Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 5.85-6.15 whereas that of Cuprite is 5.85-6.15.