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https://www.liveabout.com/platinum-jewelry-information-2043747
Aug 17, 2017 · Jewelry that contains at least 950 parts per thousand of pure platinum may be marked or described as "Platinum". Jewelry that contains 850, 900 or 950 parts per thousand of pure platinum may be marked "Plat" or "Pt" if a number is used in front of the term to disclose the amount of pure platinum in the mix, such as : "850 Plat" or "850 Pt", or
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.langantiques.com/university/jewelry-makers-mark/
Maker’s marks are the initials or name of the manufacturing firm or other representative symbol stamped into a gold, silver or platinum item. Also called ‘Trademarks,’ they often provide the only evidence that a certain piece of jewelry has indeed been manufactured by a certain jewelry maker.
https://www.georgianjewelry.com/blog/iridium-platinum-explained
It gives platinum an even harder-wearing durability. Usually jewelry and rings are often 10% iridium and 90% platinum. Hallmarks that you may find are 10 Irid 90 …
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://www.gold-traders.co.uk/blog/simple-platinum-hallmark-guide/
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://abbreviations.yourdictionary.com/articles/list-of-standard-jewelry-abbreviations-with-meanings.html
Jewelry can be made from a variety of metals, including gold, silver, and platinum. Each piece is stamped to mark its metal content, and you can also use the abbreviation to tell if the piece is plated or solid. These are a few of the most common abbreviations you’ll see: 10K - 10 karat gold
https://www.globalgemology.com/a.html
AARON BASHA Hallmark(s): "Aaron Basha", "AB" Information: Aaron Basha began designing and retailing jewelry in the 1950s. His retail store is located on Madison Avenue in Manhattan, New York. Basha is known for their baby shoe charms, often jeweled with diamonds and gems.
http://www.amaterracrianza.com/jewelry-makers-marks-in-alphabetical-order/
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