Adamite and Galena Physical Properties

Adamite

Galena

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.32-4.48

6.23

1.5 Fracture

Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic

Subconchoidal, Brittle, Metallic

1.6 Cleavage

{101}, good; {010}, poor

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

1.7 Mohs Hardness

3.5

2.5-2.75

1.8 Chemical Composition

Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)

PbS

Adamite and Galena Chemical Formula

While comparing Adamite 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 Adamite and Galena chemical formula.

Chemical formula of Adamite- Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
Chemical formula of Galena- PbS

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Adamite and Galena Specific Gravity

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