Galena and Afghanite Physical Properties

Galena

Afghanite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.232.55-2.65

1 7.18

1.5 Fracture

Subconchoidal, Brittle, Metallic

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

1.6 Cleavage

Cubic perfect on [001], parting on [111]

Perfect {10 1 0}

1.7 Mohs Hardness

2.5-2.755.5-6

2 10

1.8 Chemical Composition

PbS

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

Galena and Afghanite Chemical Formula

While comparing Galena 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 Galena and Afghanite chemical formula.

Chemical formula of Galena- PbS
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 Grey Gemstones

Galena Vs Clinochlore

Galena Vs Falcons Eye

Galena Vs Larvikite

Galena and Afghanite Specific Gravity

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