Mottramite and Gedrite Physical Properties

Mottramite

Gedrite

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

Durability

Specific Gravity

5.93.15-3.259

1 7.18

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Fracture

Sub-Conchoidal

Cleavage

None observed

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

Mohs Hardness

35.5-6

2 10

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Chemical Composition

PbCu(VO4)(OH)

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

Mottramite and Gedrite Chemical Formula

While comparing Mottramite 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 Mottramite and Gedrite chemical formula.

Chemical formula of Mottramite- PbCu(VO4)(OH)
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 Brown Gemstones

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Mottramite Vs Radiolarite

Mottramite and Gedrite Specific Gravity

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