Andalusite and Andradite Garnet Physical Properties

Andalusite

Andradite Garnet

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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

3.05-3.21

3.8-3.9

1.5 Fracture

Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)

Not Available

1.6 Cleavage

Good on {110}, poor on {100}

None

1.7 Mohs Hardness

7.5

6.5-7.5

1.8 Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Ca₃Fe³⁺₂Si₃O₁₂

Andalusite and Andradite Garnet Chemical Formula

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

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Andradite Garnet- Ca₃Fe³⁺₂Si₃O₁₂

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Andalusite and Andradite Garnet Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Andradite Garnet Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Andradite Garnet Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.8-3.9 whereas that of Andradite Garnet is 3.8-3.9.