Amethyst and Bustamite Physical Properties

Amethyst

Bustamite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

insoluble in common solvents

Partly soluble in HCl.

1.3 Durability

Not Available

1.4 Specific Gravity

2.653.32-3.43

1 7.18

1.5 Fracture

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

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

1.6 Cleavage

Indiscernible

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

1.7 Mohs Hardness

75.5-6

2 10

1.8 Chemical Composition

SiO₂

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

Amethyst and Bustamite Chemical Formula

While comparing Amethyst 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 Amethyst and Bustamite chemical formula.

Chemical formula of Amethyst- SiO₂
Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Amethyst and Bustamite Specific Gravity

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