Bertrandite and Almandine Physical Properties

Bertrandite

Almandine

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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

2.59-2.603.95-4.30

1 7.18

1.5 Fracture

Brittle, Metallic, Brittle, Metallic

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

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

none

1.7 Mohs Hardness

6-77-7.5

2 10

1.8 Chemical Composition

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

Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Bertrandite and Almandine Chemical Formula

While comparing Bertrandite and Almandine 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 Almandine chemical formula.

Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Bertrandite and Almandine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bertrandite and Almandine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bertrandite and Almandine Optical Properties during the identification of gemstone. Specific gravity of Bertrandite is 3.95-4.30 whereas that of Almandine is 3.95-4.30.