Cryolite and Boulder Opal Physical Properties

Cryolite

Boulder Opal

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.971.98-2.25

1 7.18

1.5 Fracture

Uneven

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

1.6 Cleavage

None observed

Not Available

1.7 Mohs Hardness

2.55-6.5

2 10

1.8 Chemical Composition

Na 3AlF 6Ulrich Henn and Claudio C.

SiO 2 + H 2OUlrich Henn and Claudio C.

Cryolite and Boulder Opal Chemical Formula

While comparing Cryolite 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 Cryolite and Boulder Opal chemical formula.

Chemical formula of Cryolite- Na 3AlF 6Ulrich Henn and Claudio C.
Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Cryolite and Boulder Opal Specific Gravity

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