Lazurite and Bustamite Physical Properties

Lazurite

Bustamite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Partly soluble in HCl.

1.3 Durability

Not Available

1.4 Specific Gravity

2.753.32-3.43

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

Imperfect on {110}

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

1.7 Mohs Hardness

5.55.5-6

2 10

1.8 Chemical Composition

(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.

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

Lazurite and Bustamite Chemical Formula

While comparing Lazurite 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 Lazurite and Bustamite chemical formula.

Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Lazurite and Bustamite Specific Gravity

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