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Opal: What is it after all?

3/4/2016

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Opals rough guide and worth

Opal is one of the most beautiful and enchanting gems on earth, mostly because of its origins, iridescences and lights.

There's a huge variety of opals in the world, depending usually on the colours, frailty and iridescence patterns, exactly like the 4 C's for Diamonds (Opals-Quality Factors of the  Gemological Institute of America-GIA). The opal is composed of silica and water: when the water evaporates and precipitates at low temperatures to form layers or nodules of opal in fissures, veins, and cavities of volcanic and sedimentary rocks, it generates some silica deposits; it's a  procedure that protracts during millennia as at the same time is very simple.

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2 Comments

    Authors

    Maria Elena Labianco
    Sales and Marketing for Opalia
    &
    ​Daniela Zamperetti
    Blogger and History of Art Expert


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