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https://www.leaf.tv/articles/what-does-pt-stand-for-on-a-gold-chain/
The symbol for platinum on the periodical table is "Pt." Platinum Alloy Platinum is a soft metal and, therefore, high-quality jewelry contains a combination of 95 percent platinum and 5 percent of a metal alloy, such as ruthenium or iridium, to give it strength.
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 …Estimated Reading Time: 3 mins
https://www.collectorsweekly.com/stories/100601-bracelet-marked-925-pt
I would say that you have a gold wash over sterling silver. The pt is most likely the maker, manufacturer, or place. These 2-3 letter markings on "Italy" "china" "Thailand" are nearly impossible to actually ID. Shirgirl, 7 years ago
https://www.reference.com/world-view/pt950-mean-stamped-ring-bad571d0248af8fa
Mar 28, 2020 · The stamp PT is an abbreviation for platinum, and PT950 refers to the number of parts per thousand that are pure platinum. Platinum alloys are about 90 percent to 95 percent pure; therefore, a higher percentage of an item's weight is made up of the metal. The number 950 often follows the PT abbreviation, because for alloys of platinum between 850 and 950 parts per thousand, the word …Estimated Reading Time: 1 min
https://www.pricescope.com/community/threads/platinum-pt900-or-pt950-so-whats-the-difference.123749/
Aug 26, 2009 · Depends on what is the alloy metal used. PT900 is 90% Pt but what is the alloying metal. Common alloys are using Ru, described in this article. http://journal.pricescope.com/Articles/47/1/An-Overview-Of-Common-Alloys-Used-In-Jewelry.aspx If the metal used to alloy is Ir, I …
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