Bertrandite and Sunstone Physical Properties

Bertrandite

Sunstone

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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

2.59-2.602.62-2.65

1 7.18

1.5 Fracture

Brittle, Metallic, Brittle, Metallic

Gemstones of the world (2001)

1.6 Cleavage

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

001

1.7 Mohs Hardness

6-76

2 10

1.8 Chemical Composition

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

Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

Bertrandite and Sunstone Chemical Formula

While comparing Bertrandite and Sunstone 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 Sunstone chemical formula.

Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Sunstone- Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

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Bertrandite and Sunstone Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bertrandite and Sunstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bertrandite and Sunstone Optical Properties during the identification of gemstone. Specific gravity of Bertrandite is 2.62-2.65 whereas that of Sunstone is 2.62-2.65.