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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 …
https://www.brilliance.com/education/metals/platinum
Jun 11, 2015 · 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 …
https://www.consumer.ftc.gov/articles/0294-platinum-jewelry
600 Pt. 350 Ir. = 60% pure platinum, 35% iridium; Platinum jewelry with 15% to 50% base metals also may be labeled "platinum.” These platinum/base metal alloys contain from 50 to 85% pure platinum, …
https://www.titaniumstyle.com/pr-metals.htm
Precious Metals: Platinum (Pt), Gold (Au), Silver (Ag) Whether it's a wedding band or just a new addition to your jewelry collection, precious metal inlay will add a unique touch of color to the solid look of …
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