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https://www.answers.com/Q/What_does_PL_stamped_on_the_inside_of_ring_mean
Jan 29, 2012 · pl stands for plum, it is a mark that the gold will actually be a full 14k not 13.5 What does PL 18k mean stamped on a gold necklace? Hi anything with PL …
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://www.coincommunity.com/forum/topic.asp?TOPIC_ID=231904
Jun 12, 2015 · platinum isn't measured in karats, it's measured in purity (.85-.999) so my guess is you have an 18kt white gold ring that's plated in platinum or most of the ring is 18kt white gold with another part made out of platinum, couldn't know without seeing it... as for WL it is the manufacturers mark.
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
http://www.art-amerindien.com/hallmarks/p-american-indian-jewelry-marks.htm
Indian Native American & South West marks, letter: P. Preston Monongye Hopi. Paquin's Arts & Crafts. Jimmy Patterson Navajo + shop. Prince Trading Co, Kirtland 70's. Pete Paquin. Zuni. Pa …
https://www.invaluable.com/blog/guide-to-jewelry-marks/
Apr 06, 2020 · When considering platinum jewelry, the purity mark “950” denotes a composition of 95 percent platinum with a mix of other metal alloys, while “900” is made up of 90 percent platinum, and “850” has 85 percent platinum.
https://www.langantiques.com/university/jewelry-makers-mark/
Maker’s marks are the initials or name of the manufacturing firm or other representative symbol stamped into a gold, silver or platinum item. Also called ‘Trademarks,’ they often provide the only evidence that a certain piece of jewelry has indeed been manufactured by a certain jewelry maker.
https://worldeccentricitycharm.com/blogs/news/costume-jewelry-hallmarks-a-to-z
Costume Jewelry Hallmarks: A to Z Posted by Laurie Zeiden on Sep 06, 2018 My blog series, Costume Jewelry Hallmarks , is an ongoing project to catalog costume jewelry hallmarks.
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