Black Opal and Chrome Pyrope Physical Properties

Black Opal

Chrome Pyrope

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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

1.97-2.223.62-3.80

1 7.18

1.5 Fracture

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

1.6 Cleavage

Not Available

1.7 Mohs Hardness

6-6.57-7.5

2 10

1.8 Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.

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

Black Opal and Chrome Pyrope Chemical Formula

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

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

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Black Opal and Chrome Pyrope Specific Gravity

Another important criteria for qualitative analysis of gemstones is Black Opal and Chrome Pyrope Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Chrome Pyrope Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 3.62-3.80 whereas that of Chrome Pyrope is 3.62-3.80.