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  2. Bullion coin - Wikipedia

    en.wikipedia.org/wiki/Bullion_coin

    Bullion coins can have fineness ranging from 91.9% (22 karat) to 99.99% purity (24 karat). For the VAT exemption purposes the United Kingdom defines investment coins more specifically as coins that have been minted after 1800, have a purity of not less than 900 thousandths and are, or have been, legal tender in their country of origin. [ 2 ]

  3. American Buffalo (coin) - Wikipedia

    en.wikipedia.org/wiki/American_Buffalo_(coin)

    The design of the American Buffalo gold bullion coin is a modified version of James Earle Fraser's design for the Indian Head nickel (Type 1), issued in early 1913. After a raised mound of dirt below the animal on the reverse was reduced, the Type 2 variation continued to be minted for the rest of 1913 and every year until 1938, except for 1922, 1932, and 1933 when no nickels were struck.

  4. Troy weight - Wikipedia

    en.wikipedia.org/wiki/Troy_weight

    Troy weights were first used in England in the 15th century and were made official for gold and silver in 1527. [1] The British Imperial system of weights and measures (also known as Imperial units ) was established in 1824, prior to which the troy weight system was a subset of pre-Imperial English units .

  5. Pennyweight - Wikipedia

    en.wikipedia.org/wiki/Pennyweight

    A pennyweight (dwt) is a unit of mass equal to 24 grains, 1 ⁄ 20 of a troy ounce, 1 ⁄ 240 of a troy pound, 48 ⁄ 875 avoirdupois ounce [1] and exactly 1.55517384 grams. [2] It is abbreviated dwt , d standing for denarius – (an ancient Roman coin), and later used as the symbol of an old British penny (see £sd ).

  6. Carat (mass) - Wikipedia

    en.wikipedia.org/wiki/Carat_(mass)

    The carat (ct) is a unit of mass equal to 200 mg (0.00705 oz; 0.00643 ozt), which is used for measuring gemstones and pearls. The current definition, sometimes known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, [1] [2] and soon afterwards in many countries around the world.

  7. 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 (22‑karat), while most of today's gold bullion coins are pure gold, such as the Britannia, Canadian Maple Leaf, and American Buffalo.

  8. Coins of the United States dollar - Wikipedia

    en.wikipedia.org/wiki/Coins_of_the_United_States...

    Gold, Silver, Platinum and Palladium 1973 Facility open (mainly produces bullion) Carson City: CC Gold and Silver 1870 Facility closed, 1893 [c] Charlotte: C Gold only 1838 Facility closed, 1861 Dahlonega: D [d] Gold only 1838 Facility closed, 1861 Manila [e] M or none [f] All metals 1920 Facility closed, 1922; re-opened 1925–1941 New Orleans ...

  9. File:Gold Spot Price per Gram from Jan 1971 to Jan 2012.svg

    en.wikipedia.org/wiki/File:Gold_Spot_Price_per...

    English: This chart shows the nominal price of gold along with the price in 1971 and 2011 dollars (adjusted based on the consumer price index). The historical gold price was obtained from www.igolder.com; CPI was obtained from www.rateinflation.com. The data is in section Chart Data.

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