Prase and Mexican fire opal Physical Properties

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Prase

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Mexican fire opal

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Prase

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Mexican fire opal

Prase

Prase

Mexican fire opal

Mexican fire opal

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

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-

-

2.64-2.69

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None

7

SiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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-

-

-9999

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None

-9999

SiO2·nH2O

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