Hercynite and Bustamite Physical Properties

Hercynite

Bustamite

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Physical Properties

Tenacity

Solubility

Partly soluble in HCl.

Durability

Specific Gravity

4.393.32-3.43

1 7.18

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Fracture

Uneven

Conchoidal

Cleavage

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

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

Mohs Hardness

7.5-85.5-6

2 10

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Chemical Composition

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

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

Hercynite and Bustamite Chemical Formula

While comparing Hercynite 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 Hercynite and Bustamite chemical formula.

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

Compare Yellow Gemstones

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Hercynite and Bustamite Specific Gravity

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