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https://www.liveabout.com/platinum-jewelry-information-2043747
Aug 17, 2017 · Platinum holds fine gemstones firmly in place for the life of the jewelry when used for prongs and other setting components. Platinum's natural white luster …
https://www.leaf.tv/articles/what-are-some-identifying-marks-on-a-platinum-ring/
Platinum Content Marks In most countries where platinum jewelry is manufactured, the pure platinum content is at least 85 percent, according to Platinum Today. Makers …
https://www.tentwothree.com/platinum_jewelry_information.asp
PLATINUM ESTATE JEWELRY HALLMARKS. Many estate jewelry hallmarks will be PT900, indicating that the metal is 900 parts per 1000 of pure platinum. The remaining 100 part are usually made with iridium which makes the jewelry harder. 900 Plat - 100Irid - means platinum …
https://www.gold-traders.co.uk/blog/simple-platinum-hallmark-guide/
Mar 14, 2011 · Platinum hallmarking was introduced in the UK in 1975 as a result of legislation brought about by the Hallmarking Act of 1973. Prior to this date, items containing platinum would often carry …
https://www.leaf.tv/articles/how-to-identify-jewelry-markings/
Note that a “950 Platinum” mark indicates that jewelry is 95 percent pure platinum, or 950 parts pure platinum out of 1,000. Identify this type of jewelry by any of these other marks: “Plat 950,” “Pt950,” …
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