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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.afashionblog.com/platinum-ring-stamp-meanings/
What hallmarks or stamp on platinum rings or platinum jewelry? How, then, do you identify jewelry made of platinum? Well, there are platinum content marks, as mentioned above. And in most of the countries that manufacture platinum jewelry, the highest (purest) platinum content is 85% minimum.Estimated Reading Time: 8 mins
https://platinumjewelry.com/why-platinum/pure/
To protect American consumers, a high-content platinum alloy will be marked 950Pt, 950, plat or platinum, meaning that it’s at least 95% pure, elemental platinum. It’s also the only platinum alloy that can simply bear the “Platinum” stamp to identify that it’s 95% pure platinum.
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://thinkengraved.com/blogs/news/a-guide-to-what-jewelry-stamps-mean
Apr 29, 2021 · Usually mixed with other platinum metal group alloys such as Ruthenium, rhodium, or palladium. 950 platinum will simply carry 950 in place of the 900 and is 950 parts per 1000 pure platinum. Here is a great article about the above stamps here. What does …
https://www.gold-traders.co.uk/blog/simple-platinum-hallmark-guide/
Mar 14, 2011 · All platinum items weighing more than 0.5 grams must now carry a valid hallmark when sold in the UK. The photo on the right shows a typical hallmark. A platinum hallmark will consist of 3 compulsory and 3 optional stamps. This post is a simple platinum hallmark guide, which …
https://www.specialtymetals.com/blog/2019/9/13/what-is-925-platinum
Sep 13, 2019 · You will also find pieces of jewelry that are marked “925 Silver” and “925 Gold.” Those terms mean exactly what the “925 Platinum” term means – that the item you are looking at contains 92.5% silver or gold. At other times, a ring or other piece of jewelry will only be stamped “925,” which is not very helpful, is it?
https://www.sellyourgold.com/faq/my-items-gold-silver-or-platinum
Hallmarks are distinguishing characteristics that are stamped on gold, silver and platinum items - typically to identify the items purity. There are also hallmarks that can identify where the item was made (called a makers mark), the office the metal was tested in, the year, and the designer.
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