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2. Gold-filled jewelry - Wikipedia

   en.wikipedia.org/wiki/Gold-filled_jewelry

   A watch made from gold-filled metal. Gold-filled jewelry is jewelry composed of a solid layer of gold (typically constituting at least 5% of the item's total weight) mechanically bonded to a base of either sterling silver or some base metal. The related terms "rolled gold plate" and "gold overlay" may legally be used in some contexts if the ...

3. Napier Company (jewellery) - Wikipedia

   en.wikipedia.org/wiki/Napier_Company_(jewellery)

   Napier Company (jewellery) The Napier Company (1922-present). Flask, 1925-1930. Sterling silver and cork, 9 5/8 x 4 1/2 x 1 3/16in. (24.4 x 11.4 x 3cm). Brooklyn Museum, Modernism Benefit Fund. Napier necklace with tag. The Napier Company is an American jewelry manufacturing company, and was one of the first modern corporations in the United ...

4. Colored gold - Wikipedia

   en.wikipedia.org/wiki/Colored_gold

   Amongst the alloys made of gold, silver, and copper, the hardest is the 18.1 K pink gold (75.7% gold and 24.3% copper). An alloy with only gold and silver is the hardest at 15.5 K (64.5% gold and 35.5% silver). During ancient times, due to impurities in the smelting process, gold frequently turned a reddish color.

5. Filigree - Wikipedia

   en.wikipedia.org/wiki/Filigree

   Sterling dish, filigree work. Citrine cannetille-work brooch. Filigree (also less commonly spelled filagree, and formerly written filigrann or filigrene) [citation needed] is a form of intricate metalwork used in jewellery and other small forms of metalwork . In jewellery, it is usually of gold and silver, made with tiny beads or twisted ...

6. Fineness - Wikipedia

   en.wikipedia.org/wiki/Fineness

   For example, knowing that standard 18-karat 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.

7. Silver-gilt - Wikipedia

   en.wikipedia.org/wiki/Silver-gilt

   Silver-gilt or gilded/gilt silver, sometimes known in American English by the French term vermeil, is silver (either pure or sterling) which has been gilded with gold.Most large objects made in goldsmithing that appear to be gold are actually silver-gilt; for example most sporting trophies (including medals such as the gold medals awarded in all Olympic Games after 1912) and many crown jewels ...