Gedrite and Pargasite Physical Properties

Gedrite

Pargasite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.15-3.2593.04-3.26

1 7.18

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Fracture

Splintery, Uneven

Cleavage

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

{110} perfect

Mohs Hardness

5.5-65-6

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)

NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Gedrite and Pargasite Chemical Formula

While comparing Gedrite and Pargasite 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 Pargasite 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 Pargasite- NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Brown Gemstones

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Gedrite and Pargasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gedrite and Pargasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gedrite and Pargasite Optical Properties during the identification of gemstone. Specific gravity of Gedrite is 3.04-3.26 whereas that of Pargasite is 3.04-3.26.