Realgar and Andradite Physical Properties

Realgar

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

3.563.70-4.10

1 7.18

1.5 Fracture

(e.g. graphite).

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

1.6 Cleavage

{010} Good

none

1.7 Mohs Hardness

Not Available6.5-7

2 10

1.8 Chemical Composition

AsSMichael OâDonoghue , Gems, Sixth Edition (2006)

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

Realgar and Andradite Chemical Formula

While comparing Realgar 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 Realgar and Andradite chemical formula.

Chemical formula of Realgar- AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Compare Red Gemstones

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Realgar Vs Ruby

Realgar Vs Rutile

Realgar and Andradite Specific Gravity

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