Galena and Pyrophyllite Physical Properties

Galena

Pyrophyllite

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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

6.232.65-2.90

1 7.18

1.5 Fracture

Subconchoidal, Brittle, Metallic

Gemstones (2009), Flexible Flexible fragments.

1.6 Cleavage

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

{001} Perfect

1.7 Mohs Hardness

2.5-2.75Not Available

2 10

1.8 Chemical Composition

PbS

Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Galena and Pyrophyllite Chemical Formula

While comparing Galena and Pyrophyllite 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 Pyrophyllite chemical formula.

Chemical formula of Galena- PbS
Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Galena and Pyrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Galena and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Galena and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Galena is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.