Andalusite and Antigorite Physical Properties

Andalusite

Antigorite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.05-3.212.58-2.80

1 7.18

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Fracture

Uneven, Subconchoidal, Splintery

Conchoidal

Cleavage

Good on {110}, poor on {100}

{001} Good

Mohs Hardness

7.55-5.5

2 10

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Chemical Composition

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

(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

Andalusite and Antigorite Chemical Formula

While comparing Andalusite and Antigorite 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 Antigorite chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Antigorite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

Compare Brown Gemstones

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Andalusite Vs Apophyllite

Andalusite Vs Aragonite

Andalusite and Antigorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Antigorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Antigorite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 2.58-2.80 whereas that of Antigorite is 2.58-2.80.