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Zinnwaldite
Zinnwaldite

Andalusite
Andalusite



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Zinnwaldite
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Andalusite

Zinnwaldite and Andalusite Physical Properties

1 Physical Properties
1.1 Tenacity
Elastic
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.9-3.1
3.05-3.21
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
3.5-4.0
7.5
1.8 Chemical Composition
Not Available
Al 2SiO 5Michael O’Donoghue , 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.

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

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.

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