Epidote and Afghanite Physical Properties

Epidote

Afghanite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.25-3.502.55-2.65

1 7.18

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Fracture

Conchoidal, Fibrous

Conchoidal

Cleavage

{001} perfect and {100} imperfect

Perfect {10 1 0}

Mohs Hardness

6-75.5-6

2 10

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Chemical Composition

CaAl 2(Fe3+ ,Al)Si 3O 12(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Epidote and Afghanite Chemical Formula

While comparing Epidote 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 Epidote and Afghanite chemical formula.

Chemical formula of Epidote- CaAl 2(Fe3+ ,Al)Si 3O 12(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
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

Epidote Vs Gedrite

Epidote Vs Goethite

Epidote Vs Hessonite

Epidote and Afghanite Specific Gravity

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