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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 platinum group metals, with at least 500 parts per thousand of the total pure platinum, may be marked as platinum as long as the numbers of each metal are disclosed.Estimated Reading Time: 3 mins
https://www.brilliance.com/education/metals/platinum
The most common alloy metals paired with platinum are copper, palladium, rhodium, iridium, and titanium. Although some alloys may be billed as platinum by jewelry sellers, there are stringent requirements for what constitutes a 'pure' platinum piece. Only metals marked with a 950 or 900 purity designation are considered high-grade platinum.Estimated Reading Time: 4 mins
https://www.consumer.ftc.gov/articles/platinum-gold-and-silver-jewelry
The metals used in platinum jewelry usually fall into one of three categories: other platinum group metals (palladium, ruthenium, rhodium, iridium, osmium) Marketers describe or mark platinum to show the percentage of pure platinum in the piece. To be called platinum, an item should be at least 50% pure platinum.
https://www.titaniumstyle.com/pr-metals.htm
Platinum. For the manufacturing of our titanium and platinum rings, we use the PLAT 950 (95% platinum and 5% ruthenium).Pure platinum is very malleable and therefore difficult to process. Because of this, platinum is most often mixed with other alloys in order to create jewelry.
https://applesofgold.com/jewelryblog/2009/02/understanding-the-price-of-platinum-jewelry/
Feb 03, 2009 · Platinum is a hypoallergenic virtually pure precious metal. Jewelry stores who sell high quality platinum offer 950 Grade (95% pure platinum) jewelry. Anything less should not be considered either pure or hypoallergenic or of substantive quality.
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