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2. Jewelry wire - Wikipedia

   en.wikipedia.org/wiki/Jewelry_wire

   Jewelry wire is wire, usually copper, brass, nickel, aluminium, silver, or gold, used in jewelry making. Wire is defined today as a single, usually cylindrical, elongated strand of drawn metal. However, when wire was first invented over 2,000 years BC, it was made from gold nuggets pounded into flat sheets, which were then cut into strips. The ...

3. Gold plating - Wikipedia

   en.wikipedia.org/wiki/Gold_plating

   Gold plated - gold layer thickness greater than or equal to 0.5 micron; Heavy gold plated / Vermeil - gold layer thickness greater than or equal to 2.5 micron; Gold plated silver jewellery can still tarnish as the silver atoms diffuse into the gold layer, causing slow gradual fading of its color and eventually causing tarnishing of the surface ...

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. United States Mint coin sizes - Wikipedia

   en.wikipedia.org/wiki/United_States_Mint_coin_sizes

   US Coin Sizes and Composition Steel Alloy Copper Copper Alloy Silver Alloy Silver Gold Platinum Palladium Three Cent 14 mm 0.8 g 0.750 fine 1851–1853 14 mm 0.75 g 0.900 fine 1854–1873 Half Dime 15.5 mm 1.24 g 1794–1873 Dollar 15 mm 1.67 gr 1849–1889 $5 American Gold Eagle 16.5 mm 3.11 g 1986–present $10 American Platinum Eagle 16.5 mm ...

6. Jewellery - Wikipedia

   en.wikipedia.org/wiki/Jewellery

   India remains the largest consumer of gold globally, with gold demand rising by 11% year-on-year to 760.40 tonnes in 2018. [ 88 ] According to a 2007 KPMG study, [ 89 ] the largest jewellery market is the United States with a market share of 31%, Japan , India , China , and the Middle East each with 8–9%, and Italy with 5%.

7. Jewellery chain - Wikipedia

   en.wikipedia.org/wiki/Jewellery_chain

   Gold chain with garnets, rock crystals and enamel from the 16th century, Sweden. Jewellery chains , jewelry chains or body chains are metal chains [ 1 ] [ 2 ] that are used in jewellery to encircle parts of the body, [ 3 ] namely the neck, wrists and ankles, [ 4 ] and they also serve as points to hang decorative charms and pendants .