Pietre preziose

Introduzione alle pietre preziose

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Le pietre raccontate da Brigitte Pregenzer

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Agata

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Ametista

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Ambra

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Berillo

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Calcedonio

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Corniola

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Crisolito

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Crisoprasio

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Cristallo di rocca

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Diamante

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Diaspro

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Giacinto

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Onice

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Prasio

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Rubino

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Sardio

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Sardonice

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Smeraldo

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Topazio

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Zaffiro

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