Gahnospinel and Galena Physical Properties

Gahnospinel

Galena

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.65-4.556.23

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009)

Subconchoidal, Brittle, Metallic

1.6 Cleavage

None, but may exhibit slight parting

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

1.7 Mohs Hardness

7.5-82.5-2.75

2 10

1.8 Chemical Composition

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

PbS

Gahnospinel and Galena Chemical Formula

While comparing Gahnospinel and Galena 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 Gahnospinel and Galena chemical formula.

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

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Gahnospinel and Galena Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnospinel and Galena Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnospinel and Galena Optical Properties during the identification of gemstone. Specific gravity of Gahnospinel is 6.23 whereas that of Galena is 6.23.