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  2. Crown gold - Wikipedia

    en.wikipedia.org/wiki/Crown_gold

    Crown gold is a 22 karat (kt) gold alloy used in the crown coin introduced in England in 1526 (by Henry VIII). [1] In this alloy, the proportion of gold is 22 parts out of 24 (91.667% gold). Crown gold is appreciably less prone to wear than the softer 23 kt gold of earlier gold sovereigns — an important point for coins intended for everyday ...

  3. Gold coin - Wikipedia

    en.wikipedia.org/wiki/Gold_coin

    Gold coins for sale at the Dubai Gold Souk. A gold coin is a coin that is made mostly or entirely of gold.Most gold coins minted since 1800 are 90–92% gold (22karat), while most of today's gold bullion coins are pure gold, such as the Britannia, Canadian Maple Leaf, and American Buffalo.

  4. American Gold Eagle - Wikipedia

    en.wikipedia.org/wiki/American_Gold_Eagle

    The 22 kt gold alloy is an English standard traditionally referred to as "crown gold". Crown gold alloys had not been used in U.S. coins since 1834, with the gold content having dropped since 1837 to a standard of 0.900 fine for U.S. gold coins. For American Gold Eagles the gold fraction was increased again to .9167 or (22 karat).

  5. 10 of the Most Valuable US Gold Coins

    www.aol.com/10-most-valuable-us-gold-210005622.html

    In 2007, one of the finest examples of the 13 to 15 known 1907 Saint-Gaudens Ultra High Relief $20 Double Eagle gold coins sold for $1.84 million — and the collector who bought it turned a ...

  6. Fineness - Wikipedia

    en.wikipedia.org/wiki/Fineness

    24-carat gold is pure (while 100% purity is very difficult to attain, 24-carat as a designation is permitted in commerce for a minimum of 99.95% purity), 18-carat gold is 18 parts gold, 6 parts another metal (forming an alloy with 75% gold), 12-carat gold is 12 parts gold (12 parts another metal), and so forth. [20]

  7. Doubloon - Wikipedia

    en.wikipedia.org/wiki/Doubloon

    The doubloon (from Spanish doblón, or "double", i.e. double escudo) was a two-escudo gold coin worth approximately $4 (four Spanish dollars) or 32 reales, [1] and weighing 6.766 grams (0.218 troy ounce) of 22-karat gold (or 0.917 fine; hence 6.2 g fine gold).

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