Chromite and Boulder Opal Physical Properties

Chromite

Boulder Opal

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.5-4.81.98-2.25

1 7.18

1.5 Fracture

Uneven

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

1.6 Cleavage

None, parting may develop along {111}

Not Available

1.7 Mohs Hardness

5.55-6.5

2 10

1.8 Chemical Composition

Fe++Cr2O4

SiO 2 + H 2OUlrich Henn and Claudio C.

Chromite and Boulder Opal Chemical Formula

While comparing Chromite and Boulder 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 Chromite and Boulder Opal chemical formula.

Chemical formula of Chromite- Fe++Cr2O4
Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Chromite and Boulder Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chromite and Boulder Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chromite and Boulder Opal Optical Properties during the identification of gemstone. Specific gravity of Chromite is 1.98-2.25 whereas that of Boulder Opal is 1.98-2.25.