Galena and Allanite Physical Properties

Galena

Allanite

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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

6.233.40-4.20

1 7.18

1.5 Fracture

Subconchoidal, Brittle, Metallic

Not Available

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

2.5-2.75Not Available

2 10

1.8 Chemical Composition

PbS

Not Available

Galena and Allanite Chemical Formula

While comparing Galena and Allanite 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 Allanite chemical formula.

Chemical formula of Galena- PbS

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Galena and Allanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Galena and Allanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Galena and Allanite Optical Properties during the identification of gemstone. Specific gravity of Galena is 3.40-4.20 whereas that of Allanite is 3.40-4.20.