Bustamite and Amethyst Physical Properties

Bustamite

Amethyst

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Partly soluble in HCl.

insoluble in common solvents

1.3 Durability

Not Available

1.4 Specific Gravity

3.32-3.432.65

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

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

Indiscernible

1.7 Mohs Hardness

5.5-67

2 10

1.8 Chemical Composition

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

SiO₂

Bustamite and Amethyst Chemical Formula

While comparing Bustamite and Amethyst 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 Amethyst chemical formula.

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

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Bustamite and Amethyst Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bustamite and Amethyst Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Amethyst Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 2.65 whereas that of Amethyst is 2.65.