Bustamite and Hercynite Physical Properties

Bustamite

Hercynite

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Physical Properties

Tenacity

Solubility

Partly soluble in HCl.

Durability

Specific Gravity

3.32-3.434.39

1 7.18

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Fracture

Conchoidal

Uneven

Cleavage

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

{111} Indistinct, {111} Indistinct, {111} Indistinct

Mohs Hardness

5.5-67.5-8

2 10

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Chemical Composition

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

Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

Bustamite and Hercynite Chemical Formula

While comparing Bustamite and Hercynite 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 Bustamite and Hercynite chemical formula.

Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

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Bustamite and Hercynite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bustamite and Hercynite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Hercynite Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 4.39 whereas that of Hercynite is 4.39.