Grossular and Gahnite Physical Properties

Grossular

Gahnite

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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

3.55-3.734.00-4.62

1 7.18

1.5 Fracture

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

Conchoidal, Uneven

1.6 Cleavage

none

Indistinct parting on [111]

1.7 Mohs Hardness

7-7.57.5-8

2 10

1.8 Chemical Composition

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

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Grossular and Gahnite Chemical Formula

While comparing Grossular and Gahnite 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 Grossular and Gahnite chemical formula.

Chemical formula of Grossular- Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Grossular and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Grossular and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Grossular and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Grossular is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.