Andalusite and Kurnakovite Physical Properties

Andalusite

Kurnakovite

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Physical Properties

Tenacity

Solubility

Soluble

Durability

Specific Gravity

3.05-3.211.847-1.852

1 7.18

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Fracture

Uneven, Subconchoidal, Splintery

Conchoidal

Cleavage

Good on {110}, poor on {100}

Poor to indistinct on {010}

Mohs Hardness

7.52-3

2 10

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Chemical Composition

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

Ca3Al3(SiO4)3(OH)

Andalusite and Kurnakovite Chemical Formula

While comparing Andalusite and Kurnakovite 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 Kurnakovite chemical formula.

Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Kurnakovite- Ca3Al3(SiO4)3(OH)

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Andalusite and Kurnakovite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Kurnakovite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Kurnakovite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 1.847-1.852 whereas that of Kurnakovite is 1.847-1.852.