Gedrite and Dravite Physical Properties

Gedrite

Dravite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.15-3.2593.03-3.18

1 7.18

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Fracture

Uneven, Irregular, Conchoidal

Cleavage

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

{???} Indistinct

Mohs Hardness

5.5-67-7.5

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)

Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Gedrite and Dravite Chemical Formula

While comparing Gedrite and Dravite 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 Dravite 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 Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Compare Brown Gemstones

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Gedrite and Dravite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gedrite and Dravite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gedrite and Dravite Optical Properties during the identification of gemstone. Specific gravity of Gedrite is 3.03-3.18 whereas that of Dravite is 3.03-3.18.