Diaspore and Andalusite Physical Properties

Diaspore

Andalusite

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1 Physical Properties

1.1 Tenacity

Very brittle

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.30-3.403.05-3.21

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal

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

1.6 Cleavage

{010} perfect, {110} distinct, {100} in traces

Good on {110}, poor on {100}

1.7 Mohs Hardness

6.5-77.5

2 10

1.8 Chemical Composition

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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

Diaspore and Andalusite Chemical Formula

While comparing Diaspore 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 Diaspore and Andalusite chemical formula.

Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Diaspore and Andalusite Specific Gravity

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