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https://www.liveabout.com/platinum-jewelry-information-2043747
Aug 17, 2017 · As long as 50% of the alloy contains platinum and some other combination of metals above, the piece can be labeled as containing platinum. If for instance, jewelry contains 50% platinum and 50% gold, that piece can not contain a hallmark indicating the piece contains platinum.Estimated Reading Time: 3 mins
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 commonly alloy platinum with the PGM metals—palladium, ruthenium and iridium. Copper and cobalt are also commonly alloyed with platinum for polishing ability and color.
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 alloyed with 10% iridium. PT850 - platinum at 85%.
https://www.braunschweiger.com/what-do-those-markings-on-my-jewelry-mean/
Apr 12, 2018 · 916 22kt gold. 925 Sterling silver. 900 900 Plat 100 Irid (platinum) Other markings indicate that an item is not gold at all, such as: RGE or RGP = “rolled gold electroplate” or “rolled gold plate” (gold-plated costume). 1/20 14kt or 12kt = gold-filled jewelry that has 1/20 of gold in it (thicker than costume plating but still not solid ...Estimated Reading Time: 2 mins
https://www.sellyourgold.com/faq/my-items-gold-silver-or-platinum
Hallmarks are also called assay or standard marking. Hallmarks are distinguishing characteristics that are stamped on gold, silver and platinum items - typically to identify the items purity.
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 no markings or simply ‘Plat’ or ‘Platinum’ and would be of varying purity. A typical platinum hallmark
https://www.leaf.tv/articles/how-to-identify-gold-silver-and-platinum-metals-like-a-jeweler/
You will be using the magnifying glass or loupe to view the markings on the jewelry. On a ring, the marking is inside the shank. On a chain or bracelet, it's at the end on a piece called a tag, or on the clasp. On a pendant, it's on the bail, which is the part of the piece that the chain goes through, or …
https://www.invaluable.com/blog/guide-to-jewelry-marks/
Apr 06, 2020 · When considering platinum jewelry, the purity mark “950” denotes a composition of 95 percent platinum with a mix of other metal alloys, while “900” is made up of 90 percent platinum, and “850” has 85 percent platinum.
https://jewelry.lovetoknow.com/about-jewelry/understanding-markings-jewelry
Vintage ring with maker's mark and platinum marking If the manufacturer does stamp the piece with metal content, they are required to place their trademark or the retailer's trademark right next to the metal content stamp.Author: Kate Miller-Wilson
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