Precious Opal and Charlesite Physical Properties

Precious 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

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references

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 · nH 2OGemdat.org , Management Team (2012)

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

Precious Opal and Charlesite Chemical Formula

While comparing Precious 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 Precious Opal and Charlesite chemical formula.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Chemical formula of Charlesite- Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)

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Precious Opal and Charlesite Specific Gravity

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