Andradite Garnet and Achroite Physical Properties

Andradite Garnet

Achroite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.8-3.92.90-3.40

1 7.18

1.5 Fracture

Not Available

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

None

Not Available

1.7 Mohs Hardness

6.5-7.57-7.5

2 10

1.8 Chemical Composition

Ca₃Fe³⁺₂Si₃O₁₂

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Andradite Garnet and Achroite Chemical Formula

While comparing Andradite Garnet and Achroite 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 Garnet and Achroite chemical formula.

Chemical formula of Andradite Garnet- Ca₃Fe³⁺₂Si₃O₁₂
Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

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Andradite Garnet and Achroite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andradite Garnet and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andradite Garnet and Achroite Optical Properties during the identification of gemstone. Specific gravity of Andradite Garnet is 2.90-3.40 whereas that of Achroite is 2.90-3.40.