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2. Chemical coloring of metals - Wikipedia

   en.wikipedia.org/wiki/Chemical_coloring_of_metals

   Brown or black can be used as a base color for copper patina. If the amount of chlorides decreases the color will be more bluish-green, if carbonate decreases, more yellow-green. [27] Black for copper. Solution of sodium polysulfide 2.5%, items must be submerged in the solution after color developing, wash, dry and wax or varnish colored object ...

3. Colored gold - Wikipedia

   en.wikipedia.org/wiki/Colored_gold

   Black gold is a type of gold used in jewelry. [13] [14] Black-colored gold can be produced by various methods: Patination by applying sulfur- and oxygen-containing compounds. Plasma-assisted chemical vapor deposition process involving amorphous carbon; Controlled oxidation of gold containing chromium or cobalt (e.g. 75% gold, 25% cobalt [3]).

4. This Is Why Your Skin Turns Green After Wearing Certain Jewelry

   www.aol.com/why-skin-turns-green-wearing...

   Buy stainless steel or platinum jewelry, or jewelry made from precious metals like sterling silver or solid gold. Quince Bold 14k Gold Hoops Mejuri Wishbone Stacker Set

5. Stainless steel - Wikipedia

   en.wikipedia.org/wiki/Stainless_steel

   Stainless steel, also known as inox, corrosion-resistant steel (CRES), and rustless steel, is an alloy of iron that is resistant to rusting and corrosion. It contains iron with chromium and other elements such as molybdenum , carbon , nickel and nitrogen depending on its specific use and cost.

6. 29+ personalized holiday gifts

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   Dannyshi Stainless Steel Initial Cufflinks $9.99 at Amazon If you’re looking for an affordable gift that still feels high end, these initial cufflinks are a great option.

7. Black oxide - Wikipedia

   en.wikipedia.org/wiki/Black_oxide

   Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder. [1] It is used to add mild corrosion resistance, for appearance, and to minimize light reflection. [ 2 ]

8. Glamorous gold jewelry staples you can wear on repeat — all ...

   www.aol.com/lifestyle/glamorous-gold-jewelry...

   Affordable gold jewelry on Amazon. Amazon. Pavoi 14K Yellow Gold Plated Lightweight Chunky Open Hoops. Sometimes, the most simple designs are the greatest show-stoppers. Hypoallergenic, nickel ...

9. Gold-filled jewelry - Wikipedia

   en.wikipedia.org/wiki/Gold-filled_jewelry

   If the gold layer is 12 kt or higher, the minimum layer of karat gold in an item stamped gold-filled marks must equal at least 1 ⁄ 20th the total weight of the item. The most common stamps found on gold-filled jewelry are 1 ⁄ 20th 12kt GF and 1 ⁄ 20th 14kt GF. Also common is 1 ⁄ 10th 10kt. These standards are for modern gold-filled items.