Bustamite and Cinnabar Physical Properties

Bustamite

Cinnabar

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Physical Properties

Tenacity

Slightly sectile

Solubility

Partly soluble in HCl.

1.04 x 10⁻²⁵ g per 100 ml water (Ksp at 25°C = 2 x 10⁻³²)

Durability

Specific Gravity

3.32-3.432

1 7.18

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Fracture

Conchoidal

Uneven

Cleavage

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

Prismatic {10 1 0}, perfect

Mohs Hardness

5.5-62-2.5

2 10

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Chemical Composition

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

HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Bustamite and Cinnabar Chemical Formula

While comparing Bustamite and Cinnabar 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 Cinnabar chemical formula.

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

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Bustamite and Cinnabar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bustamite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 2 whereas that of Cinnabar is 2.