Gahnite and Herderite Physical Properties

Gahnite

Herderite

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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

4.00-4.622.90-3.02

1 7.18

1.5 Fracture

Conchoidal, Uneven

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

Indistinct parting on [111]

Indistinct on {110}

1.7 Mohs Hardness

7.5-85-5.5

2 10

1.8 Chemical Composition

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

CaBePO 4(F,OH)Ulrich Henn and Claudio C.

Gahnite and Herderite Chemical Formula

While comparing Gahnite and Herderite 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 Herderite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.

Compare Blue Gemstones

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Gahnite Vs Hydrogrossular

Gahnite and Herderite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Herderite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 2.90-3.02 whereas that of Herderite is 2.90-3.02.