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2. Wohlwill process - Wikipedia

   en.wikipedia.org/wiki/Wohlwill_process

   The resulting gold is 99.999% pure, and of higher purity than gold produced by the other common refining method, the Miller process, which produces gold of 99.5% purity. [1] [2] [3] For industrial gold production the Wohlwill process is necessary for highest purity gold applications.

3. Gold Coins and Bars: 5 Strategies To Get the Best Possible ...

   www.aol.com/gold-coins-bars-5-strategies...

   In terms of specific places to sell gold bars and/or coins, choices include the United States Gold Bureau and dealers/platforms such as Cash for Gold USA, Express Cash Gold, Worthy, Sell Your Gold ...

4. Costco is selling gold bars - and the wholesale giant says ...

   www.aol.com/costco-selling-gold-bars-wholesale...

   Wholesale retail store is selling gold bars for nearly $2,000 ... which can cost from $60 to $120 a year. ... the one-ounce bars from South Africa’s Rand Refinery are selling for the whopping ...

5. You Can Now Buy Gold Bars at Costco, But They Are Selling Out ...

   www.aol.com/now-buy-gold-bars-costco-154844912.html

   How Much Do Gold Bars Cost at Costco? So how much are these? While the price is available for members only, according to Insider, they retail at $1,949.99 and $1,979.99, respectively.

6. Gold extraction - Wikipedia

   en.wikipedia.org/wiki/Gold_extraction

   Mercury forms a mercury-gold amalgam with smaller gold particles, and then the gold is concentrated by boiling away the mercury from the amalgam. This is effective in extracting very small gold particles, but the process is hazardous due to the toxicity of mercury vapour. Large-scale use of mercury stopped in the 1960s.

7. Largest gold companies - Wikipedia

   en.wikipedia.org/wiki/Largest_gold_companies

   The lower price of gold in 2013 is expected to impact gold production in the coming years; Barrick Gold is slowing construction at one of its largest gold projects Pascua Lama (18 m ounces of gold, 676 m ounces of silver) while in Australia mines are being shuttered by companies in an attempt to curb costs. [7] [8]