Anorthite and Boulder Opal Physical Properties

Anorthite

Boulder Opal

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.771.98-2.25

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

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

1.6 Cleavage

Perfect [001] good [010] poor [110]

Not Available

1.7 Mohs Hardness

6-6.55-6.5

2 10

1.8 Chemical Composition

CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

SiO 2 + H 2OUlrich Henn and Claudio C.

Anorthite and Boulder Opal Chemical Formula

While comparing Anorthite and Boulder Opal 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 Anorthite and Boulder Opal chemical formula.

Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Anorthite and Boulder Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Anorthite and Boulder Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anorthite and Boulder Opal Optical Properties during the identification of gemstone. Specific gravity of Anorthite is 1.98-2.25 whereas that of Boulder Opal is 1.98-2.25.