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Grandidierite
Grandidierite

Andalusite
Andalusite



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Grandidierite
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Andalusite

Grandidierite and Andalusite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.85-3.00
Uneven
Perfect
7.5
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
 
-
-
-
3.05-3.21
Uneven, Subconchoidal, Splintery
Good on {110}, poor on {100}
7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth edition (2006) More from other references

Grandidierite and Andalusite Chemical Formula

While comparing Grandidierite 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 Grandidierite and Andalusite chemical formula.

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Grandidierite and Andalusite Specific Gravity

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