1 jan 1612 ano - Antonio Neri

Descrição:

L'arte vetraria (1612) Antonio Neri - agrees alchemists developed glassmaking in effort to counterfeit gems; believes his 'art' and imitations surpass gems except in terms of hardness. 'Thus, in the early modern period, hardness replaces colour and transparency as the most important defining characteristic of gemstones.

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