Friedelite and Andalusite Physical Properties

Friedelite

Andalusite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.06-3.193.05-3.21

1 7.18

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Fracture

Uneven

Uneven, Subconchoidal, Splintery

Cleavage

{010} Perfect

Good on {110}, poor on {100}

Mohs Hardness

4-57.5

2 10

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Chemical Composition

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

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

Friedelite and Andalusite Chemical Formula

While comparing Friedelite 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 Friedelite and Andalusite chemical formula.

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

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Friedelite and Andalusite Specific Gravity

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