Zoisite and Almandine Physical Properties

Zoisite

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

3.20-3.50

3.95-4.30

1.5 Fracture

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

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

1.6 Cleavage

Perfect {010} imperfect {100}

none

1.7 Mohs Hardness

6-7

7-7.5

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

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

Zoisite and Almandine Chemical Formula

While comparing Zoisite 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 Zoisite and Almandine chemical formula.

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

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Zoisite and Almandine Specific Gravity

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