Andalusite and Friedelite Physical Properties

Andalusite

Friedelite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.05-3.213.06-3.19

1 7.18

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Fracture

Uneven, Subconchoidal, Splintery

Uneven

Cleavage

Good on {110}, poor on {100}

{010} Perfect

Mohs Hardness

7.54-5

2 10

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Chemical Composition

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

Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.

Andalusite and Friedelite Chemical Formula

While comparing Andalusite and Friedelite 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 Friedelite chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Friedelite- Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.

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Andalusite and Friedelite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Friedelite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Friedelite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.06-3.19 whereas that of Friedelite is 3.06-3.19.