Emerald and Almandine Physical Properties

Emerald

Almandine

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

2.67-2.78

3.95-4.30

1.5 Fracture

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

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

1.6 Cleavage

Imperfect on the [0001]

none

1.7 Mohs Hardness

7.5-8

7-7.5

1.8 Chemical Composition

Be₃Al₂SiO₆

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

Emerald and Almandine Chemical Formula

While comparing Emerald 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 Emerald and Almandine chemical formula.

Chemical formula of Emerald- Be₃Al₂SiO₆
Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Emerald and Almandine Specific Gravity

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