Bustamite and Charlesite Physical Properties

Bustamite

Charlesite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Partly soluble in HCl.

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.32-3.431.79

1 7.18

1.5 Fracture

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

Irregular/uneven, Brittle, Metallic

1.6 Cleavage

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

Perfect on {10bar10}

1.7 Mohs Hardness

5.5-62.5

2 10

1.8 Chemical Composition

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

Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)

Bustamite and Charlesite Chemical Formula

While comparing Bustamite and Charlesite 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 Charlesite chemical formula.

Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Charlesite- Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)

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Bustamite and Charlesite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bustamite and Charlesite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Charlesite Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 1.79 whereas that of Charlesite is 1.79.