dore bead after parting

dore bead after parting: Золотодобыча: золотая корточка, королёк, из которого удалено серебро, корточка, растравленный королёк, чистое золото

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assaying — In chemical analysis, the process of determining proportions of metal, particularly precious metal, in ores and metallurgical products. The most important assaying technique grew largely out of the experiments of the ancient alchemists and… … Universalium
silver processing — Introduction preparation of the ore for use in various products. Silver has long been valued for its white metallic lustre, its ability to be readily worked, and its resistance to the corrosive effects of moisture and oxygen. The… … Universalium

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