Afghanite and Hercynite Physical Properties

Afghanite

Hercynite

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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

2.55-2.654.39

1 7.18

1.5 Fracture

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

ConchoidalGemdat.org, Uneven

1.6 Cleavage

Perfect {10 1 0}

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

1.7 Mohs Hardness

5.5-67.5-8

2 10

1.8 Chemical Composition

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

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

Afghanite and Hercynite Chemical Formula

While comparing Afghanite and Hercynite 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 Afghanite and Hercynite chemical formula.

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

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Afghanite and Hercynite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Afghanite and Hercynite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Hercynite Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 4.39 whereas that of Hercynite is 4.39.