Bustamite and Ettringite Physical Properties

Bustamite

Ettringite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Partly soluble in HCl.

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

3.32-3.431.77

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

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

Perfect on {10 1 0}

1.7 Mohs Hardness

5.5-62-2.5

2 10

1.8 Chemical Composition

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

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Bustamite and Ettringite Chemical Formula

While comparing Bustamite and Ettringite 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 Ettringite chemical formula.

Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Bustamite and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bustamite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bustamite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Bustamite is 1.77 whereas that of Ettringite is 1.77.