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Cupellation is a refining process in metallurgy in which ores or alloyed metals are heated to very high temperatures and subjected to controlled operations to separate noble metals like gold and silver, from base metals like lead, copper, zinc, arsenic, antimony, or bismuth, in the ore. Cupellation is based on the principle that precious metals typically …
History & Technology
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silver lead metals ores archaeological rehren metallurgy renaissance th used process litharge mining mines eds cupels production precious assay fire
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Cupellation | is a | refining process in metallurgy in which ores or alloyed metals are heated to very high temperatures and subjected to controlled operations to separate noble metals like gold and… | 0.90 | text |
| lead | instance of | testing fresh metals | 0.80 | text |
| recycled metals to determine their purity for jewellery | instance of | testing fresh metals | 0.80 | text |
| coin making | instance of | testing fresh metals | 0.80 | text |
| galena | instance of | generally in the form of sulfides | 0.80 | text |
| shells | instance of | The base of the hearth was dug in the form of a saucepan and covered with an inert and porous material rich in calcium or magnesium | 0.80 | text |
| lime | instance of | The base of the hearth was dug in the form of a saucepan and covered with an inert and porous material rich in calcium or magnesium | 0.80 | text |
| or bone ash | instance of | The base of the hearth was dug in the form of a saucepan and covered with an inert and porous material rich in calcium or magnesium | 0.80 | text |
| Rio Tinto | instance of | Mines | 0.80 | text |
| near Huelva in Spain | instance of | Mines | 0.80 | text |
| became an important political | instance of | Mines | 0.80 | text |
| economic site around the Mediterranean Sea | instance of | Mines | 0.80 | text |
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