Nacre and Andradite Physical Properties

Nacre

Andradite

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1 Physical Properties

1.1 Tenacity

Not Available

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

Not Available

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

1.6 Cleavage

Not Available

none

1.7 Mohs Hardness

Not Available6.5-7

2 10

1.8 Chemical Composition

Not Available

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

Nacre and Andradite Chemical Formula

While comparing Nacre 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 Nacre and Andradite chemical formula.

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

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Nacre and Andradite Specific Gravity

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