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The Nether, a hell-like dimension in the video game Minecraft The Nether , a sci-fi play Nether (video game) , a first-person multiplayer survival video game for Microsoft Windows
The most common refractory ores are pyrite and arsenopyrite, which are sulfide ores that trap the gold within them. Refractory ores require pre-treatment before the gold can be adequately extracted. [1] The pressure oxidation process is used to prepare such ores for conventional gold extraction processes such as cyanidation. It is performed in ...
High-grade gold ore from the Harvard Mine, Jamestown, California, a wide quartz-gold vein in California's Mother Lode. Specimen is 3.2 cm (1.3 in) wide. Various theories of ore genesis explain how the various types of mineral deposits form within Earth's crust. Ore-genesis theories vary depending on the mineral or commodity examined.
Iron oxide copper gold (IOCG) deposits are considered to be metasomatic expressions of large crustal-scale alteration events driven by intrusive activity. The deposit type was first recognised by discovery and study of the supergiant Olympic Dam copper-gold-uranium deposit (Olympic Dam mine), and South American examples.
Roasted gold ore from Cripple Creek, Colorado. Roasting has driven off the tellurium from the original calaverite, leaving behind vesicular blebs of native gold. Roasting is a process of heating a sulfide ore to a high temperature in the presence of air. It is a step in the processing of certain ores.
Comprehensive accounts of the salt cementation processes is given by Biringuccio in his The Method of cementing gold and of Bringing it to its Ultimate Fineness.; in the Probierbuchlein – Little Books on Assaying; by Georgius Agricola in book 10 of De Re Metallica; and by Ercker in his Treatise on ores and assaying. This was a period where ...
Gold(I) sulfide, Au 2 S. Formed by reaction of hydrogen sulfide with gold(I) compounds. Gold(III) sulfide, Au 2 S 3, claimed material but unsubstantiated. Gold tellurides: Au 2 Te 3, Au 3 Te 5, and AuTe 2 (approximate formulas) are known as non-stoichiometric compounds. They show metallic conductivity. Au 3 Te 5 is a superconductor at 1.62 K. [1]
Coloradoite, also known as mercury telluride (HgTe), is a rare telluride ore associated with metallic deposit (especially gold and silver). Gold usually occurs within tellurides, such as coloradoite, as a high-finess native metal. [5] The quest for mining led to the discovery of telluride ores which were found to be associated with metals.
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