Apophyllite and Galena Physical Properties

Apophyllite

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

2.30-2.506.23

1 7.18

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009)

Subconchoidal, Brittle, Metallic

1.6 Cleavage

Perfect on (001)

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

1.7 Mohs Hardness

4.5-52.5-2.75

2 10

1.8 Chemical Composition

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

PbS

Apophyllite and Galena Chemical Formula

While comparing Apophyllite 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 Apophyllite and Galena chemical formula.

Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
Chemical formula of Galena- PbS

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Apophyllite and Galena Specific Gravity

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