Ajoite and Andradite Physical Properties

Ajoite

Andradite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Decomposed by acids

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.963.70-4.10

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Perfect on {010}

none

1.7 Mohs Hardness

56.5-7

2 10

1.8 Chemical Composition

(K,Na)3Cu20Al3Si29O76(OH)16•~8(H2O)

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

Ajoite and Andradite Chemical Formula

While comparing Ajoite 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 Ajoite and Andradite chemical formula.

Chemical formula of Ajoite- (K,Na)3Cu20Al3Si29O76(OH)16•~8(H2O)
Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Ajoite and Andradite Specific Gravity

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