Charlesite and Andradite Physical Properties

Charlesite

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

1.793.70-4.10

1 7.18

1.5 Fracture

Irregular/uneven, Brittle, Metallic

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

1.6 Cleavage

Perfect on {10bar10}

none

1.7 Mohs Hardness

2.56.5-7

2 10

1.8 Chemical Composition

Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)

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

Charlesite and Andradite Chemical Formula

While comparing Charlesite 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 Charlesite and Andradite chemical formula.

Chemical formula of Charlesite- Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)
Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Charlesite and Andradite Specific Gravity

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