Boulder Opal and Cuprite Physical Properties

Boulder 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

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

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 + H 2OUlrich Henn and Claudio C.

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

Boulder Opal and Cuprite Chemical Formula

While comparing Boulder 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 Boulder Opal and Cuprite chemical formula.

Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Chemical formula of Cuprite- Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Boulder Opal Vs Chrysocolla

Boulder Opal and Cuprite Specific Gravity

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