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2. How to Clean Gold Jewelry, According to a Professional Jeweler

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   Gold jewelry is beautiful, durable and relatively easy to maintain. That said, not all gold is created equal and even the solid (i.e., not gold-plated) stuff requires an occasional polish ...

3. Have You Tried This Seltzer Hack for Your Gemstones? - AOL

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   Here's how to clean silver, gold, pearls, costume jewelry, remove tarnish, shine diamonds and clean gemstones, plus DIY jewelry cleaning hacks with baking soda.

4. Here’s How to Clean Silver Jewelry the Right Way (And ... - AOL

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   Silver jewelry is stunning, always trendy and versatile enough to be dressed up or dressed down. But of course, anyone who’s owned a silver piece will tell you that the precious metal is prone ...

5. Jewellery cleaning - Wikipedia

   en.wikipedia.org/wiki/Jewellery_cleaning

   Keeping your jewelry clean helps to ensure that the gemstone (s) keep a good appearance and prevents dirt and grease (among others) from loosening them. Dirty jewelry may also cause skin irritation. [1] A professional cleaning may take anywhere from a few minutes to a few days depending on the circumstances. The cleaner would first inspect the ...

6. Aqua regia - Wikipedia

   en.wikipedia.org/wiki/Aqua_regia

   Aqua regia ( / ˈreɪɡiə, ˈriːdʒiə /; from Latin, "regal water" or "royal water") is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. [b] Aqua regia is a fuming liquid. Freshly prepared aqua regia is colorless, but it turns yellow, orange or red within seconds from the formation of nitrosyl chloride and ...

7. Pickling (metal) - Wikipedia

   en.wikipedia.org/wiki/Pickling_(metal)

   Pickling is a metal surface treatment used to remove impurities, such as stains, inorganic contaminants, and rust or scale from ferrous metals, copper, precious metals and aluminum alloys. [1] A solution called pickle liquor, which usually contains acid, is used to remove the surface impurities. It is commonly used to descale or clean steel in ...