Amethyst and Bertrandite Physical Properties

Amethyst

Bertrandite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

insoluble in common solvents

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.652.59-2.60

1 7.18

1.5 Fracture

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

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

Indiscernible

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

1.7 Mohs Hardness

76-7

2 10

1.8 Chemical Composition

SiO₂

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

Amethyst and Bertrandite Chemical Formula

While comparing Amethyst 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 Amethyst and Bertrandite chemical formula.

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

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Amethyst and Bertrandite Specific Gravity

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