Gahnite and Gedrite Physical Properties

Gahnite

Gedrite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

4.00-4.623.15-3.259

1 7.18

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Fracture

Conchoidal, Uneven

Cleavage

Indistinct parting on [111]

Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.

Mohs Hardness

7.5-85.5-6

2 10

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Chemical Composition

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

(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Gahnite and Gedrite Chemical Formula

While comparing Gahnite and Gedrite 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 Gedrite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Gedrite- (Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Compare Blue Gemstones

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Gahnite Vs Lazurite

Gahnite and Gedrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Gedrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Gedrite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 3.15-3.259 whereas that of Gedrite is 3.15-3.259.