Almandine and Zoisite Physical Properties

Almandine

Zoisite

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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

3.20-3.50

1.5 Fracture

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

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Even

1.6 Cleavage

none

Perfect {010} imperfect {100}

1.7 Mohs Hardness

7-7.5

6-7

1.8 Chemical Composition

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

Ca₂Al₃(SiO₄)₃(OH)

Almandine and Zoisite Chemical Formula

While comparing Almandine and Zoisite 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 Zoisite chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)

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Almandine and Zoisite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Zoisite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Zoisite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 3.20-3.50 whereas that of Zoisite is 3.20-3.50.