Kunzite and Andradite Physical Properties

Kunzite

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

3.15-3.21

3.70-4.10

1.5 Fracture

Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)

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

1.6 Cleavage

1,2 prismatic

none

1.7 Mohs Hardness

6-7

6.5-7

1.8 Chemical Composition

LiAlSi₂O₆

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

Kunzite and Andradite Chemical Formula

While comparing Kunzite 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 Kunzite and Andradite chemical formula.

Chemical formula of Kunzite- LiAlSi₂O₆
Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Kunzite and Andradite Specific Gravity

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