Zinnwaldite and Andalusite Physical Properties

Zinnwaldite

Andalusite

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1 Physical Properties

1.1 Tenacity

Elastic

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.9-3.13.05-3.21

1 7.18

1.5 Fracture

Uneven

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

1.6 Cleavage

Perfect basal {001}

Good on {110}, poor on {100}

1.7 Mohs Hardness

3.5-4.07.5

2 10

1.8 Chemical Composition

Not Available

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

Zinnwaldite and Andalusite Chemical Formula

While comparing Zinnwaldite 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 Zinnwaldite and Andalusite chemical formula.

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

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Zinnwaldite and Andalusite Specific Gravity

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