Coral and Boulder Opal Physical Properties

Coral

Boulder 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

2.60-2.70

1.98-2.25

1.5 Fracture

Irregular, Irregular, Gemstones of the world (2001)

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

1.6 Cleavage

Not Available

1.7 Mohs Hardness

3-4

5-6.5

1.8 Chemical Composition

CaCO 3Ulrich Henn and Claudio C.

SiO 2 + H 2OUlrich Henn and Claudio C.

Coral and Boulder Opal Chemical Formula

While comparing Coral 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 Coral and Boulder Opal chemical formula.

Chemical formula of Coral- CaCO 3Ulrich Henn and Claudio C.
Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Coral and Boulder Opal Specific Gravity

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