Galena and Bustamite Physical Properties

Galena

Bustamite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

Partly soluble in HCl.

1.3 Durability

Not Available

1.4 Specific Gravity

6.233.32-3.43

1 7.18

1.5 Fracture

Subconchoidal, Brittle, Metallic

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

{100} perfect; {110} and {1 1 0} good; {010} poor

1.7 Mohs Hardness

2.5-2.755.5-6

2 10

1.8 Chemical Composition

PbS

(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Galena and Bustamite Chemical Formula

While comparing Galena and Bustamite 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 Bustamite chemical formula.

Chemical formula of Galena- PbS
Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Galena and Bustamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Galena and Bustamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Galena and Bustamite Optical Properties during the identification of gemstone. Specific gravity of Galena is 3.32-3.43 whereas that of Bustamite is 3.32-3.43.