Almandine and Bertrandite Physical Properties

Almandine

Bertrandite

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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

3.95-4.30

2.59-2.60

1.5 Fracture

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

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

none

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

1.7 Mohs Hardness

7-7.5

6-7

1.8 Chemical Composition

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

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

Almandine and Bertrandite Chemical Formula

While comparing Almandine 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 Almandine and Bertrandite chemical formula.

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

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Almandine and Bertrandite Specific Gravity

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