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  2. Gold parting - Wikipedia

    en.wikipedia.org/wiki/Gold_parting

    Silver was removed by filtering and gold was then recovered by evaporating the liquid and heating the residue. Nitric acid was suitable for separating small quantities of gold from silver and aqua regia used to separate small quantities of silver from gold. Aqua regia acid process is used by refiners of scrap gold used in jewelry manufacturing.

  3. Cupellation - Wikipedia

    en.wikipedia.org/wiki/Cupellation

    16th century cupellation furnaces (per Agricola). Cupellation is a refining process in metallurgy in which ores or alloyed metals are treated under 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, present in the ore.

  4. Patio process - Wikipedia

    en.wikipedia.org/wiki/Patio_process

    The silver separation process generally differed from gold parting and gold extraction, although amalgamation with mercury is also sometimes used to extract gold. While gold was often found in the Americas as a native metal or alloy , silver was often found as a compound such as silver chloride and silver sulfide , and therefore required ...

  5. Gold vs. silver investing: Which is better when interest ...

    www.aol.com/gold-vs-silver-investing-better...

    Gold and silver are both precious metal assets worth investing in, but one could be a better bet right now. / Credit: Getty Images/iStockphoto Until recently, inflation had been high in the U.S.

  6. Gold vs. silver: Which is better for your portfolio?

    www.aol.com/gold-vs-silver-better-portfolio...

    When prices across the economy start climbing, gold and silver often become go-to alternative assets for investors. Gold, in particular, has been an effective inflation hedge. To illustrate this ...

  7. Silver - Wikipedia

    en.wikipedia.org/wiki/Silver

    Since silver is more reactive than gold, supplies of native silver were much more limited than those of gold. [64] For example, silver was more expensive than gold in Egypt until around the fifteenth century BC: [66] the Egyptians are thought to have separated gold from silver by heating the metals with salt, and then reducing the silver ...