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https://www.invaluable.com/blog/guide-to-jewelry-marks/
Apr 06, 2020 · In the United States, the National Gold and Silver Stamping Act of 1906 required jewelers to include an accurate purity mark, which indicates the materials used in a given piece. In 1961, the American government also mandated that jewelry manufacturers include a maker’s mark, which indicates the producer of a piece of jewelry.
https://www.consumer.ftc.gov/articles/platinum-gold-and-silver-jewelry
When you shop for gold jewelry, look for the karat quality mark. The karat mark tells you how much pure gold is in the piece. Pure gold, or 24 karat (24K) gold, is soft, so it’s often mixed with other metals to increase its hardness and durability when it’s used in jewelry. The total of …
https://www.kovels.com/identification-guides/jewelry-identification-guide/jewelry-quality-marks.html
Jewelry. Jewelry Quality Marks. To read this article — and over 25,000 more — try Kovels Membership FREE for 7 Days. Kovels Knowledge Members get full access to 25,000 articles on antiques and collectibles from 60 years of publication. Start your Kovels Knowledge Free Trial NOW or LOGIN.Estimated Reading Time: 1 min
https://partner.bluestembrands.com/merchandising/public/Documents/Jewelry%20Quality%20Assurance%20Requirements.pdf
Jewelry Quality Inspection Criteria . Metals . a. Jewelry made with karat gold, sterling silver and platinum must have both a fineness stamp and supplier trademark stamp. Where it is not feasible to stamp the product, a hang tag is acceptable; b. Random assays will be taken to determine proper gold, or platinum fineness;
https://sellercentral.amazon.com/gp/help/external/201269180?language=en-US
All units offered against a single ASIN must be uniform with regard to design, construction, color and surface finish, and gemstones must meet the standards set forth in the gemstone guidelines (see Pearls and colored gemstone standards). Ring shanks must be thick enough to withstand a moderate amount of hand-applied pressure.Gold: 6k, 9k, 10k, 14k, 18k, 22k, 24k
https://www.qvcuk.com/UK/images/vr_pdfs/JewQualityManual%20v4.6%20%2004-11-2010.pdf
General Manufacturing Guidelines 3 . 3. Marking Requirements 5 . 3.1 Required Marks . 5. 3.2 Permissible Marks . 5. 3.3 Non-permissible Marks . 5. 3.4 Application Method: Hallmark and Makersmark ... This manual is an overview of the minimum quality requirements for jewellery sold by QVC. Although QVC has produced these guidelines, the standards ...
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