Andalusite and Sapphirine Physical Properties

Andalusite

Sapphirine

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

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

3.40-3.58

Conchoidal, Uneven

{010} Perfect

7.5

(Al,Mg) 8(Al,Si) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Andalusite and Sapphirine Chemical Formula

While comparing Andalusite and Sapphirine 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 Sapphirine chemical formula.

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Andalusite and Sapphirine Specific Gravity

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