Hemimorphite and Galena Physical Properties

Hemimorphite

Galena

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.30-3.506.23

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

Subconchoidal, Brittle, Metallic

1.6 Cleavage

Perfect on {110}, poor on {101}, {001} rare

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

1.7 Mohs Hardness

52.5-2.75

2 10

1.8 Chemical Composition

Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

PbS

Hemimorphite and Galena Chemical Formula

While comparing Hemimorphite 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 Hemimorphite and Galena chemical formula.

Chemical formula of Hemimorphite- Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Galena- PbS

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Hemimorphite and Galena Specific Gravity

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