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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 is a type of jewelry manufactured in the Black Hills of South Dakota. It was first created in the 1870s during the Black Hills Gold Rush by a French goldsmith named Henri LeBeau, who is said to have dreamed about the design after passing out from thirst and starvation. Black Hills gold jewelry depicts leaves, grape ...

4. Hallmark - Wikipedia

   en.wikipedia.org/wiki/Hallmark

   A hallmark is an official mark or series of marks struck on items made of metal, mostly to certify the content of noble metals —such as platinum, gold, silver and in some nations, palladium. In a more general sense, the term hallmark is used to refer to any standard of quality.

5. Your Ring Could Be Worth Thousands: How To Spot Valuable ...

   www.aol.com/finance/ring-could-worth-thousands...

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6. Napier Company (jewellery) - Wikipedia

   en.wikipedia.org/wiki/Napier_Company_(jewellery)

   Napier Company (jewellery) The Napier Company (1922-present). Flask, 1925-1930. Sterling silver and cork, 9 5/8 x 4 1/2 x 1 3/16in. (24.4 x 11.4 x 3cm). Brooklyn Museum, Modernism Benefit Fund. Napier necklace with tag. The Napier Company is an American jewelry manufacturing company, and was one of the first modern corporations in the United ...

7. BIS hallmark - Wikipedia

   en.wikipedia.org/wiki/BIS_hallmark

   The BIS system of hallmarking of gold jewellery began in April 2000. The standard specifications governing this system are IS 1417 (grades of gold and gold alloys, jewellery/artefacts), IS 1418 (assaying of gold in gold bullion, gold alloys and gold jewellery/artefacts), IS 2790 (guidelines for manufacture of 14, 18 and 22 carat gold alloys only ), IS 3095 (gold solders for use in manufacture ...