Kyanite and Bertrandite Physical Properties

Kyanite

Bertrandite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.53-3.652.59-2.60

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

[100] perfect [010] imperfect with 79° angle between

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

1.7 Mohs Hardness

4-76-7

2 10

1.8 Chemical Composition

Not Available

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

Kyanite and Bertrandite Chemical Formula

While comparing Kyanite and Bertrandite 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 Kyanite and Bertrandite chemical formula.

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

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Kyanite and Bertrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Bertrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Bertrandite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 2.59-2.60 whereas that of Bertrandite is 2.59-2.60.