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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", orEstimated Reading Time: 3 mins
https://www.titaniumstyle.com/pr-metals.htm
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. The most commonly used alloys for platinum are palladium, rhodium and iridium.
https://www.brilliance.com/education/metals/platinum
Only metals marked with a 950 or 900 purity designation are considered high-grade platinum. Alloys containing a lower ratio are often used to make jewelry, but these pieces don't impart the same high standards of quality, longevity, or beauty. At Brilliance, we …Estimated Reading Time: 4 mins
https://www.consumer.ftc.gov/articles/platinum-gold-and-silver-jewelry
To be called platinum, an item should be at least 50% pure platinum. Items that have 50% to 85% pure platinum combined with other platinum group metals should say the amount of pure platinum and other platinum group metals. Any item that's less than 50% pure platinum should not …
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