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2. Colored gold - Wikipedia

   en.wikipedia.org/wiki/Colored_gold

   Ternary plot of different colors of Ag–Au–Cu alloys [1]. Colored gold is the name given to any gold that has been treated using techniques to change its natural color. Pure gold is slightly reddish yellow in color, [2] but colored gold can come in a variety of different colors by alloying it with different elements.

3. Baublebar is having a sale on gold jewelry — just in time for ...

   www.aol.com/lifestyle/baublebar-is-having-a-sale...

   If you've been procrastinating on Valentine's Day gifts, here's some welcome news to get you in the spirit: For one week only you can get 20% off all fine jewelry 18k gold styles at Baublebar ...

4. Fineness - Wikipedia

   en.wikipedia.org/wiki/Fineness

   For example, knowing that standard 18-carat yellow gold consists of 75% gold, 12.5% silver and the remaining 12.5% of copper (all by mass), the volume of pure gold in this alloy will be 60% since gold is much denser than the other metals used: 19.32 g/cm 3 for gold, 10.49 g/cm 3 for silver and 8.96 g/cm 3 for copper.

5. Platinum sterling - Wikipedia

   en.wikipedia.org/wiki/Platinum_sterling

   The platinum is used to replace at least some of the copper present in a typical sterling silver alloy, which provides a greater light reflectivity (by refining the grain structure) and resistance to tarnish (thought to be caused by oxidation of copper) than standard sterling silver. Platinum Sterling is a cheaper alternative to white gold.

6. Necklace - Wikipedia

   en.wikipedia.org/wiki/Necklace

   1870–1910: The Edwardian era saw a resurgence of pearl necklaces, in addition to a dog-collar style of necklace made of gold or platinum with inset diamonds, emeralds, or rubies. [4] The Art Nouveau movement inspired symbolic, abstract designs with natural and animal motifs. [ 6 ]

7. Jewellery - Wikipedia

   en.wikipedia.org/wiki/Jewellery

   An example of gold-plated jewellery. For platinum, gold, and silver jewellery, there are many techniques to create finishes. The most common are high-polish, satin/matte, brushed, and hammered. High-polished jewellery is the most common and gives the metal a highly reflective, shiny look.