Peridot and Andalusite Physical Properties

Peridot

Andalusite

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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

1.54-1.553.05-3.21

1 7.18

1.5 Fracture

Conchoidal

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

1.6 Cleavage

Poor

Good on {110}, poor on {100}

1.7 Mohs Hardness

6.5-77.5

2 10

1.8 Chemical Composition

(Mg,Fe)₂SiO₄

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

Peridot and Andalusite Chemical Formula

While comparing Peridot and Andalusite 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 Andalusite chemical formula.

Chemical formula of Peridot- (Mg,Fe)₂SiO₄
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Peridot and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Peridot and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Peridot and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Peridot is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.