Gedrite and Afghanite Physical Properties

Gedrite

Afghanite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.15-3.259

2.55-2.65

1.5 Fracture

Not Available

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle

1.6 Cleavage

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

Perfect {10 1 0}

1.7 Mohs Hardness

5.5-6

1.8 Chemical Composition

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

(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

Gedrite and Afghanite Chemical Formula

While comparing Gedrite and Afghanite 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 Afghanite 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 Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

Compare Brown Gemstones

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Gedrite and Afghanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gedrite and Afghanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gedrite and Afghanite Optical Properties during the identification of gemstone. Specific gravity of Gedrite is 2.55-2.65 whereas that of Afghanite is 2.55-2.65.