Chrome Pyrope and Black Opal Physical Properties

Chrome Pyrope

Black Opal

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.62-3.801.97-2.22

1 7.18

1.5 Fracture

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

1.6 Cleavage

Not Available

1.7 Mohs Hardness

7-7.56-6.5

2 10

1.8 Chemical Composition

Mg 3(Al,Cr) 2(SiO 4) 3Gemdat.org , Management Team (2012)

SiO 2 + H 2OUlrich Henn and Claudio C.

Chrome Pyrope and Black Opal Chemical Formula

While comparing Chrome Pyrope and Black 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 Chrome Pyrope and Black Opal chemical formula.

Chemical formula of Chrome Pyrope- Mg 3(Al,Cr) 2(SiO 4) 3Gemdat.org , Management Team (2012)
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Chrome Pyrope and Black Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chrome Pyrope and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chrome Pyrope and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Chrome Pyrope is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.