Herderite and Gahnite Physical Properties

Herderite

Gahnite

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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

2.90-3.024.00-4.62

1 7.18

1.5 Fracture

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

Conchoidal, Uneven

1.6 Cleavage

Indistinct on {110}

Indistinct parting on [111]

1.7 Mohs Hardness

5-5.57.5-8

2 10

1.8 Chemical Composition

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

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

Herderite and Gahnite Chemical Formula

While comparing Herderite 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 Herderite and Gahnite chemical formula.

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

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Herderite and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Herderite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Herderite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Herderite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.