Boulder Opal and Charlesite Physical Properties

Boulder Opal

Charlesite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.251.79

1 7.18

1.5 Fracture

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

Irregular/uneven, Brittle, Metallic

1.6 Cleavage

Not Available

Perfect on {10bar10}

1.7 Mohs Hardness

5-6.52.5

2 10

1.8 Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.

Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)

Boulder Opal and Charlesite Chemical Formula

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

Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Chemical formula of Charlesite- Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)

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Boulder Opal and Charlesite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Boulder Opal and Charlesite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boulder Opal and Charlesite Optical Properties during the identification of gemstone. Specific gravity of Boulder Opal is 1.79 whereas that of Charlesite is 1.79.