Creedite and Black Opal Physical Properties

Creedite

Black 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

2.701.97-2.22

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

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

1.6 Cleavage

Perfect on {100}

Not Available

1.7 Mohs Hardness

4.56-6.5

2 10

1.8 Chemical Composition

Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.

SiO 2 + H 2OUlrich Henn and Claudio C.

Creedite and Black Opal Chemical Formula

While comparing Creedite 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 Creedite and Black Opal chemical formula.

Chemical formula of Creedite- Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Creedite and Black Opal Specific Gravity

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