Gahnite and Dumortierite Physical Properties

Gahnite

Dumortierite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.00-4.623.26-3.41

1 7.18

1.5 Fracture

Conchoidal, Uneven

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

1.6 Cleavage

Indistinct parting on [111]

Distinct on {100}, poor on {110}; parting on {001}

1.7 Mohs Hardness

7.5-87-8.5

2 10

1.8 Chemical Composition

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

AlAl₆O₃BSi₃O₁₈

Gahnite and Dumortierite Chemical Formula

While comparing Gahnite and Dumortierite 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 Gahnite and Dumortierite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈

Compare Blue Gemstones

Gahnite Vs Indicolite Blue Tourmaline

Gahnite Vs Hydrogrossular

Gahnite Vs Howlite

Gahnite and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.