Herderite and Gedrite Physical Properties

Herderite

Gedrite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

2.90-3.023.15-3.259

1 7.18

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Fracture

Subconchoidal, Conchoidal

Cleavage

Indistinct on {110}

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

Mohs Hardness

5-5.55.5-6

2 10

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Chemical Composition

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

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

Herderite and Gedrite Chemical Formula

While comparing Herderite 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 Herderite and Gedrite chemical formula.

Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.
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 Colorless Gems

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Herderite and Gedrite Specific Gravity

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