Nephrite and Andradite Physical Properties

Nephrite

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

2.90-3.103.70-4.10

1 7.18

1.5 Fracture

Splintery, Granular, Splintery, Granular, Gemstones (2009)

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

1.6 Cleavage

Not Available

none

1.7 Mohs Hardness

6-6.56.5-7

2 10

1.8 Chemical Composition

Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references

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

Nephrite and Andradite Chemical Formula

While comparing Nephrite 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 Nephrite and Andradite chemical formula.

Chemical formula of Nephrite- Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Nephrite and Andradite Specific Gravity

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