Polyhalite and Andradite Garnet Physical Properties

Polyhalite

Andradite Garnet

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.783.8-3.9

1 7.18

1.5 Fracture

Conchoidal, Brittle

Not Available

1.6 Cleavage

Perfect on {10 1 }; parting on {010}

None

1.7 Mohs Hardness

3.56.5-7.5

2 10

1.8 Chemical Composition

Not Available

Ca₃Fe³⁺₂Si₃O₁₂

Polyhalite and Andradite Garnet Chemical Formula

While comparing Polyhalite and Andradite Garnet 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 Polyhalite and Andradite Garnet chemical formula.

Chemical formula of Andradite Garnet- Ca₃Fe³⁺₂Si₃O₁₂

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Polyhalite and Andradite Garnet Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Andradite Garnet Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Andradite Garnet Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 3.8-3.9 whereas that of Andradite Garnet is 3.8-3.9.