Anorthite and Mexican fire opal Physical Properties

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Anorthite

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Mexican fire opal

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Anorthite

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Mexican fire opal

Anorthite

Anorthite

Mexican fire opal

Mexican fire opal

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

Brittle

-

-

2.77

Uneven

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

6-6.5

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

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-

-

-9999

-

None

-9999

SiO2·nH2O

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