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Grandidierite
Grandidierite

Gahnite
Gahnite



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Grandidierite
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Gahnite

Grandidierite and Gahnite 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.
 
-
-
-
4.00-4.62
Conchoidal, Uneven
Indistinct parting on [111]
7.5-8
ZnAl 2O 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Grandidierite and Gahnite Chemical Formula

While comparing Grandidierite and Gahnite 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 Gahnite chemical formula.

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Grandidierite and Gahnite Specific Gravity

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