Almandine and Riebeckite Physical Properties

Almandine

Riebeckite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.30

3.28-3.44

1.5 Fracture

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

Uneven, Splintery, Brittle

1.6 Cleavage

none

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}

1.7 Mohs Hardness

7-7.5

5.0-6.0

1.8 Chemical Composition

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

Not Available

Almandine and Riebeckite Chemical Formula

While comparing Almandine and Riebeckite 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 Riebeckite chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Almandine and Riebeckite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.