Ettringite and Bustamite Physical Properties

Ettringite

Bustamite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Partially soluble in water

Partly soluble in HCl.

1.3 Durability

Not Available

1.4 Specific Gravity

1.773.32-3.43

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Perfect on {10 1 0}

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

1.7 Mohs Hardness

2-2.55.5-6

2 10

1.8 Chemical Composition

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

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

Ettringite and Bustamite Chemical Formula

While comparing Ettringite 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 Ettringite and Bustamite chemical formula.

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

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Ettringite and Bustamite Specific Gravity

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