Herderite and Hercynite Physical Properties

Herderite

Hercynite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

2.90-3.024.39

1 7.18

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Fracture

Subconchoidal, Conchoidal

Uneven

Cleavage

Indistinct on {110}

{111} Indistinct, {111} Indistinct, {111} Indistinct

Mohs Hardness

5-5.57.5-8

2 10

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Chemical Composition

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

Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

Herderite and Hercynite Chemical Formula

While comparing Herderite and Hercynite 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 Hercynite chemical formula.

Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

Compare Colorless Gems

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Herderite Vs Pectolite

Herderite Vs Phenakite

Herderite and Hercynite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Herderite and Hercynite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Herderite and Hercynite Optical Properties during the identification of gemstone. Specific gravity of Herderite is 4.39 whereas that of Hercynite is 4.39.