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Platinum Jewelry: What are PGM and Platinum Marks?

    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 …

What Are Some Identifying Marks on a Platinum Ring? LEAFtv

    https://www.leaf.tv/articles/what-are-some-identifying-marks-on-a-platinum-ring/
    Rings containing 850 or more parts pure platinum may be described as "platinum" if they use the number "850," or "85% or more" to qualify "Platinum" or its abbreviation in the content marking. Abbreviation marks for other PGMs include: "Plat." or "Pt." for platinum; …

Simple Platinum Hallmark Guide - Gold-Traders (UK) Ltd

    https://www.gold-traders.co.uk/blog/simple-platinum-hallmark-guide/
    Mar 14, 2011 · Platinum hallmarking was introduced in the UK in 1975 as a result of legislation brought about by the Hallmarking Act of 1973. Prior to this date, items containing platinum would often carry …

Jewelry Maker’s Mark Antique Jewelry University

    https://www.langantiques.com/university/jewelry-makers-mark/
    Boucheron Maker’s 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 …

Antique and Vintage Jewelry Maker's Marks: A Collector’s Guide

    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 …

How to Identify Jewelry Markings LEAFtv

    https://www.leaf.tv/articles/how-to-identify-jewelry-markings/
    Remember that jewelry marked “900 Platinum” is 90 percent pure platinum, or 900 parts pure platinum out of 1,000. Look for any of these other marks to indicate this type of jewelry: “900 Plat,” “Plat 900,” “Pt900” and “900Pt.” Determine whether jewelry …

Jewelry Identification Marks: Hallmarks & Maker's Marks

    https://truval.com/blog/jewelry-identification-marks/
    Throughout history, these marks were etched into noble metals to certify their legitimacy, leaving little-to-no question as to where each piece had come from. Markings are typically found on items made of silver, gold, platinum, …

Hallmarks on Period Jewelry Antique Jewelry University

    https://www.langantiques.com/university/hallmarks-on-period-jewelry/
    Jewelry Maker's Marks Database Traditionally the maker’s mark is the main responsibility mark for the gold (or platinum/silver) content of an artifact. When problems arise, the maker (or company) can be …

Jewelry Makers Marks In Alphabetical Order - Photos ...

    http://www.amaterracrianza.com/jewelry-makers-marks-in-alphabetical-order/
    Nov 29, 2016 · Of vine jewelry s researching ume jewelry sponsor s marks in watch cases jewelry sts what do they really mean how to read precious metal hallmarks Jewelry Makers Marks In Alphabetical Order BeautifulearthjaSilver Jewelry Marks Learn To Identify And DateHallmarks Maker S Marks Resource Antique JewelryJewelry Markings Chart N Materi… Continue Reading Jewelry Makers Marks …

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