Galena and Gahnospinel Physical Properties

Galena

Gahnospinel

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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

6.233.65-4.55

1 7.18

1.5 Fracture

Subconchoidal, Brittle, Metallic

ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

None, but may exhibit slight parting

1.7 Mohs Hardness

2.5-2.757.5-8

2 10

1.8 Chemical Composition

PbS

(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)

Galena and Gahnospinel Chemical Formula

While comparing Galena and Gahnospinel 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 Gahnospinel chemical formula.

Chemical formula of Galena- PbS
Chemical formula of Gahnospinel- (Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)

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Galena and Gahnospinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Galena and Gahnospinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Galena and Gahnospinel Optical Properties during the identification of gemstone. Specific gravity of Galena is 3.65-4.55 whereas that of Gahnospinel is 3.65-4.55.