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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. Black Hills gold jewelry - Wikipedia

    en.wikipedia.org/wiki/Black_Hills_gold_jewelry

    Black Hills gold jewelry depicts leaves, grape clusters and vines, and is made with alloys of gold with standard yellow gold as well as green and pink gold. [ 1 ] [ 2 ] In 1980, the 8th Circuit affirmed an injunction ruling that if a manufacturer was to call its jewelry Black Hills Gold, then it must be made in the Black Hills. [ 3 ]

  4. Colored gold - Wikipedia

    en.wikipedia.org/wiki/Colored_gold

    Pink gold uses the least copper, followed by rose gold, with red gold having the highest copper content. Examples of the common alloys for 18K rose gold, 18K red gold, 18K pink gold, and 12K red gold include: [4] 18K red gold: 75% gold, 25% copper; 18K rose gold: 75% gold, 22.25% copper, 2.75% silver; 18K pink gold: 75% gold, 20% copper, 5% silver

  5. Fineness - Wikipedia

    en.wikipedia.org/wiki/Fineness

    For example, a gold alloy of 127 ⁄ 128 fineness (that is, 99.2% purity) could have been described as being 23-karat, 3-grain, 1-quart gold. The carat fractional system is increasingly being complemented or superseded by the millesimal system, described above for bullion, though jewelry generally tends to still use the carat system.

  6. Saddle Ridge Hoard - Wikipedia

    en.wikipedia.org/wiki/Saddle_Ridge_Hoard

    The face value of the coins totaled $27,980, but was assessed to be worth $10 million. The hoard contained $27,460 in twenty-dollar coins, $500 in ten-dollar coins, and $20 in five-dollar coins, all dating from 1847 to 1894. The collection is the largest known discovery of buried gold coins that has ever been recovered in the United States. [1]

  7. Gold treasure trove uncovered in 1,200-year-old elite burial ...

    www.aol.com/gold-treasure-trove-uncovered-1...

    Archaeologists found gold plates, beads and earrings along with several sacrificial victims. Gold treasure trove uncovered in 1,200-year-old elite burial in Panama. Take a look

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