Bustamite and Riebeckite Physical Properties

Bustamite

Riebeckite

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Physical Properties

Tenacity

Brittle

Solubility

Partly soluble in HCl.

Durability

Specific Gravity

3.32-3.433.28-3.44

1 7.18

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Fracture

Conchoidal

Uneven, Splintery

Cleavage

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

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}

Mohs Hardness

5.5-65.0-6.0

2 10

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Chemical Composition

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

Na2Fe2+3Fe3+2Si8O22(OH)2

Bustamite and Riebeckite Chemical Formula

While comparing Bustamite and Riebeckite 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 Riebeckite chemical formula.

Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Riebeckite- Na2Fe2+3Fe3+2Si8O22(OH)2

Compare Red Gemstones

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Bustamite and Riebeckite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bustamite and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.