Bertrandite and Common Opal Physical Properties

Bertrandite

Common 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

2.59-2.601.98-2.50

1 7.18

1.5 Fracture

Brittle, Metallic, Brittle, Metallic

Conchoidal, Conchoidal, Gemstones of the world (2001)

1.6 Cleavage

{001} Perfect, {110} Distinct, {101} Distinct

Not Available

1.7 Mohs Hardness

6-75.5-6.5

2 10

1.8 Chemical Composition

Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Bertrandite and Common Opal Chemical Formula

While comparing Bertrandite and Common 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 Bertrandite and Common Opal chemical formula.

Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

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Bertrandite and Common Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bertrandite and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bertrandite and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Bertrandite is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.