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  2. Gold-filled jewelry - Wikipedia

    en.wikipedia.org/wiki/Gold-filled_jewelry

    If the gold layer is 12 kt or higher, the minimum layer of karat gold in an item stamped gold-filled marks must equal at least 1 ⁄ 20th the total weight of the item. The most common stamps found on gold-filled jewelry are 1 ⁄ 20th 12kt GF and 1 ⁄ 20th 14kt GF. Also common is 1 ⁄ 10th 10kt. These standards are for modern gold-filled items.

  3. United States Bullion Depository - Wikipedia

    en.wikipedia.org/wiki/United_States_Bullion...

    The first wave of gold shipments was made semi-weekly between January 11 and June 17, 1937, and overseen by the United States Post Office Department. [7] [8] The gold was transported from the New York Assay Office and the Philadelphia Mint onto trains using postal trucks and municipal police escorts. [8]

  4. Gold parting - Wikipedia

    en.wikipedia.org/wiki/Gold_parting

    Gold quality was increased at the surface by 80–95% gold compared to 64–75% gold at the interior found in Nahal Qanah Cave dated to the 4th millennium BC. Further evidence is from three gold chisels from the 3rd Millennium BC royal cemetery at Ur that had a surface of high gold (83%), low silver (9%) and copper (8%) compared with an ...

  5. Fineness - Wikipedia

    en.wikipedia.org/wiki/Fineness

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

  6. Sovereign (British coin) - Wikipedia

    en.wikipedia.org/wiki/Sovereign_(British_coin)

    The sovereign is a British gold coin with a nominal value of one pound sterling (£1) and contains 0.2354 troy ounces (113.0 gr; 7.32 g) of pure gold.Struck since 1817, it was originally a circulating coin that was accepted in Britain and elsewhere in the world; it is now a bullion coin and is sometimes mounted in jewellery.

  7. Judge rules US must return ‘cursed’ $1B emerald to Brazil ...

    www.aol.com/judge-rules-us-must-return-205130212...

    An 836-pound “cursed” emerald worth nearly $1 billion will be returned to Brazil after 15 years under lock and key in Los Angeles. The 180,000-carat Bahia Emerald was smuggled out of the South ...

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