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Peridot
Peridot

Andradite
Andradite



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Peridot
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Andradite

Peridot and Andradite Physical Properties

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1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.54-1.553.70-4.10
Amber
1 7.18
1.5 Fracture
Conchoidal
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
Poor
none
1.7 Mohs Hardness
6.5-76.5-7
Amber
2 10
1.8 Chemical Composition
(Mg,Fe)2SiO4
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Peridot and Andradite Chemical Formula

While comparing Peridot 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 Peridot and Andradite chemical formula.

  • Chemical formula of Peridot- (Mg,Fe)2SiO4
  • Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Peridot and Andradite Specific Gravity

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