Bustamite and Grandidierite Physical Properties

Bustamite

Grandidierite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Partly soluble in HCl.

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.32-3.432.85-3.00

1 7.18

1.5 Fracture

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

Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven

1.6 Cleavage

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

Perfect

1.7 Mohs Hardness

5.5-67.5

2 10

1.8 Chemical Composition

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

(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.

Bustamite and Grandidierite Chemical Formula

While comparing Bustamite and Grandidierite 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 Grandidierite chemical formula.

Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.

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Bustamite and Grandidierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bustamite and Grandidierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Grandidierite Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 2.85-3.00 whereas that of Grandidierite is 2.85-3.00.