Hercynite and Afghanite Physical Properties

Hercynite

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

4.392.55-2.65

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

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

1.6 Cleavage

{111} Indistinct, {111} Indistinct, {111} Indistinct

Perfect {10 1 0}

1.7 Mohs Hardness

7.5-85.5-6

2 10

1.8 Chemical Composition

Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

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

Hercynite and Afghanite Chemical Formula

While comparing Hercynite 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 Hercynite and Afghanite chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

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Hercynite and Afghanite Specific Gravity

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