Bertrandite and Amethyst Physical Properties

Bertrandite

Amethyst

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

insoluble in common solvents

1.3 Durability

Not Available

1.4 Specific Gravity

2.59-2.602.65

1 7.18

1.5 Fracture

Brittle, Metallic, Brittle, Metallic

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

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

Indiscernible

1.7 Mohs Hardness

6-77

2 10

1.8 Chemical Composition

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

SiO₂

Bertrandite and Amethyst Chemical Formula

While comparing Bertrandite and Amethyst 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 Amethyst chemical formula.

Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Amethyst- SiO₂

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Bertrandite and Amethyst Specific Gravity

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