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  2. Black Hills gold jewelry - Wikipedia

    en.wikipedia.org/wiki/Black_Hills_gold_jewelry

    The finished jewelry known as Black Hills Gold must be produced in the Black Hills of South Dakota. The different colors of gold used for leaves and other details are made when the pure 24 Karat yellow gold is alloyed with copper to achieve the traditional 14 karat pink (or red) gold, and the gold is combined with silver to create the 14 karat ...

  3. Victorian jewellery - Wikipedia

    en.wikipedia.org/wiki/Victorian_jewellery

    Materials: Common materials used were gold, seed pearls, ivory, tortoiseshell, coral, onyx, agate, diamonds, [4] amber, amethyst, emerald and quartz. [5] Common jewellery worn: Rings and brooches, bracelets and cameos. [4] Gold mourning ring used during the Grand period

  4. Colored gold - Wikipedia

    en.wikipedia.org/wiki/Colored_gold

    Black gold is a type of gold used in jewelry. [16] [17] 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 [4]).

  5. Native American jewelry - Wikipedia

    en.wikipedia.org/wiki/Native_American_jewelry

    North American Indian Jewelry and Adornment: From Prehistory to the Present. New York: Harry N. Abrams, 1999: 170-171. ISBN 0-8109-3689-5. Haley, James L. Apaches: a history and culture portrait. Norman: University of Oklahoma Press, 1997. ISBN 978-0-8061-2978-5. Karasik, Carol. The Turquoise Trail: Native American Jewelry and Culture of the ...

  6. Philosopher's stone - Wikipedia

    en.wikipedia.org/wiki/Philosopher's_stone

    The smattering I have of the Philosophers stone, (which is something more than the perfect exaltation of gold) hath taught me a great deale of Divinity. — (R.M.Part 1:38) [ 13 ] A mystical text published in the 17th century called the Mutus Liber appears to be a symbolic instruction manual for concocting a philosopher's stone.

  7. Formula One sponsorship liveries - Wikipedia

    en.wikipedia.org/wiki/Formula_One_sponsorship...

    Formula One sponsorship liveries have been used since the 1968 season. Before the arrival of sponsorship liveries in 1968 the nationality of the team determined the colour of a car entered by the team, e.g. cars entered by Italian teams were rosso corsa red, cars entered by French teams were bleu de France blue, and cars entered by British teams (with several exceptions, such as cars entered ...