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The name is mostly applied informally to compositions between 20–80% gold and 80–20% silver, but these are strictly called gold or silver depending on the dominant element. Analysis of the composition of electrum in ancient Greek coinage dating from about 600 BC shows that the gold content was about 55.5% in the coinage issued by Phocaea.
Silver was removed by filtering and gold was then recovered by evaporating the liquid and heating the residue. Nitric acid was suitable for separating small quantities of gold from silver and aqua regia used to separate small quantities of silver from gold. Aqua regia acid process is used by refiners of scrap gold used in jewelry manufacturing.
Some jewellery is plated to give it a shiny, reflective look or to achieve a desired colour. Sterling silver jewellery may be plated with a thin layer of 0.999 fine silver (a process known as flashing) or plated with rhodium or gold. Base metal costume jewellery may also be plated with silver, gold, or rhodium for a more attractive finish.
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. [5] [6] [7]
Jewellery items in the hoard include two silver disc-headed pins, a separate pin-head, a niello strap-end and a gold finger-ring. [2] Objects associated with metal-working include a lead weight inset with a piece of circular copper-alloy interlace, two oval silver wire loops, and a fragment of or unfinished cross. [1]
Gold filigree intricate work from Portugal Albanian silver jewellery from 19th and 20th century 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.