Andradite and Hardystonite Physical Properties

Andradite

Hardystonite

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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

3.70-4.103.396-3.443

1 7.18

1.5 Fracture

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

Brittle, Metallic

1.6 Cleavage

none

[001] good, [100] and [110] fair

1.7 Mohs Hardness

6.5-73-4

2 10

1.8 Chemical Composition

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

Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

Andradite and Hardystonite Chemical Formula

While comparing Andradite and Hardystonite 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 Andradite and Hardystonite chemical formula.

Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

Compare Green Gemstones

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Andradite Vs Aragonite

Andradite Vs Augite

Andradite and Hardystonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andradite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andradite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Andradite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.