Piemontite and Andradite Physical Properties

Piemontite

Andradite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

Not Available3.70-4.10

1 7.18

1.5 Fracture

Uneven, Splintery

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

1.6 Cleavage

[001] good, [100] distinct

none

1.7 Mohs Hardness

6-6.56.5-7

2 10

1.8 Chemical Composition

Not Available

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

Piemontite and Andradite Chemical Formula

While comparing Piemontite and Andradite 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 Piemontite and Andradite chemical formula.

Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Piemontite and Andradite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Piemontite and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Piemontite and Andradite Optical Properties during the identification of gemstone. Specific gravity of Piemontite is 3.70-4.10 whereas that of Andradite is 3.70-4.10.