Bertrandite and Verdelite Physical Properties

Bertrandite

Verdelite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

2.59-2.60

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

6-7

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

2.90-3.40

Conchoidal

Indiscernible

7-7.5

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Bertrandite and Verdelite Chemical Formula

While comparing Bertrandite and Verdelite 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 Verdelite chemical formula.

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Bertrandite and Verdelite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bertrandite and Verdelite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bertrandite Vs Verdelite during the identification of gemstone. Specific gravity of Bertrandite is whereas that of Verdelite is .