Gedrite and Mottramite Physical Properties

Gedrite

Mottramite

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

Durability

Specific Gravity

3.15-3.2595.9

1 7.18

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Fracture

Sub-Conchoidal

Cleavage

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

None observed

Mohs Hardness

5.5-63

2 10

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Chemical Composition

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

PbCu(VO4)(OH)

Gedrite and Mottramite Chemical Formula

While comparing Gedrite and Mottramite 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 Gedrite and Mottramite chemical formula.

Chemical formula of Gedrite- (Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Mottramite- PbCu(VO4)(OH)

Compare Brown Gemstones

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Gedrite and Mottramite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gedrite and Mottramite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gedrite and Mottramite Optical Properties during the identification of gemstone. Specific gravity of Gedrite is 5.9 whereas that of Mottramite is 5.9.