Gold Marks Decoded: 585, 750, 1/20 12K GF, RGP, HGE & 7 More People Misread

#GoldJewelry #JewelryMarks #VintageJewelry Gold Marks Decoded: 585, 750, 1/20 12K GF, RGP, HGE & 7 More People Misread That little stamp near the clasp says "12K"... so it's 12 karat gold, right? Not if there's a fraction in front of it. And that "585" you almost tossed in the costume pile? It may be 14 karat gold all the way through. Gold marks are some of the most misread details in any family jewelry box. In this video we slow down and read them the way careful collectors do: every letter, every number, every fraction. Then we turn the piece over and ask the question most people skip: does the construction actually agree with the stamp? You'll learn: What 585, 750, 375 (9CT) and 417 (10K) really mean, and why a "low" number can be a better sign than a fancy word How to read 1/20 12K GF like a sentence, and why 1/10 10K can carry more gold than 1/20 14K The real difference between gold filled, RGP, HGE, GEP, gold plate and vermeil under the U.S. federal Jewelry Guides Why a clasp mark may only describe the clasp What a magnet can and cannot tell you The empty space beside a karat mark, and what a 1961 law says should be there A GIA lab case where gold plated over lower-karat gold fooled a surface reading Which professional answers which question, and why The 4-step system: READ - CLASSIFY - COMPARE - VERIFY. FREE DOWNLOAD - Gold Mark Decoder Blueprint (tables, fraction math, the five places to inspect, wear-color guide, and a "Do Not Assume" checklist): https://drive.google.com/file/d/1uLTJ... Tell me in the comments: what's the strangest gold mark in your family jewelry box? Type it exactly as stamped. Sources & further reading: U.S. Federal Trade Commission - Guides for the Jewelry, Precious Metals, and Pewter Industries (16 CFR Part 23), Sections 23.3 (gold content) and 23.4 (vermeil) U.S. Federal Trade Commission - Statement of Basis and Purpose, Final Revisions to the Jewelry Guides (2018) United States Code, Title 15, Section 297 - National Gold and Silver Stamping Act (trademark requirement, 1961 amendment) Gemological Institute of America - Gems & Gemology, Summer 2025 Lab Notes, "Gold-Plated Gold" (Carlos Bautista) Gemological Institute of America - Gems & Gemology, Winter 2024, "Chemical Analysis in the Gemological Laboratory: XRF and LA-ICP-MS" The Goldsmiths' Company Assay Office (London) - What Is a Hallmark / UK Hallmarks UK Government / British Hallmarking Council - Hallmarking Guidance Notes Birmingham Assay Office - Hallmarking: legislation and requirements The Plumb Club - National Gold and Silver Marking Act The Plumb Club - Spring Ring Clasps: All You Need to Know Disclaimer: This video and the free Blueprint are for education and identification only. They are not an appraisal, insurance valuation, or laboratory authentication. Please check with a certified appraiser and your state/local regulations before buying, selling, or insuring valuable items. #AmericanLegendTools #GoldMarks #GoldHallmarks #GoldFilled #EstateJewelry #InheritedJewelry #JewelryIdentification #AntiqueJewelry #Vermeil #HowToTellRealGold #JewelryCollector #VintageFinds