Pumpellyite and Andalusite Physical Properties

Pumpellyite

Andalusite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

3.20-3.30

Perfect

5-6

Ca 2(Mg,Fe,Mn,Al) 2(SiO 4)(Si 2O 7)(OH) 2 · H 2OUlrich Henn and Claudio C.

3.05-3.21

Uneven, Subconchoidal, Splintery

Good on {110}, poor on {100}

7.5

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

Pumpellyite and Andalusite Chemical Formula

While comparing Pumpellyite 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 Pumpellyite and Andalusite chemical formula.

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Pumpellyite and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pumpellyite and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pumpellyite Vs Andalusite during the identification of gemstone. Specific gravity of Pumpellyite is whereas that of Andalusite is .