Piemontite and Andalusite Physical Properties

Piemontite

Andalusite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

Not Available3.05-3.21

1 7.18

1.5 Fracture

Uneven, Splintery

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

1.6 Cleavage

[001] good, [100] distinct

Good on {110}, poor on {100}

1.7 Mohs Hardness

6-6.57.5

2 10

1.8 Chemical Composition

Not Available

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

Piemontite and Andalusite Chemical Formula

While comparing Piemontite 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 Piemontite and Andalusite chemical formula.

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

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Piemontite and Andalusite Specific Gravity

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