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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://jewelrykind.com/gold-jewelry-quality-marks-list/
The most obvious stamp to look for is karat markings, such as “12k” or “18k”. 24 karat gold is essentially pure gold, so a marking of “12k” would indicate that the jewelry is 50 percent gold, and “18k” would mean it’s 75 percent gold. 18 karat gold is generally considered very high quality, although many people have jewelry (even wedding rings) made from 10, 12, or 14 karat gold.
https://www.drloriv.com/antique-tips/silver-jewelry-marks-and-more/
Silver purity marks specify fineness or metal content. The most common silver mark is the sterling mark which reaches the sterling standard and demonstrates that a piece of jewelry is comprised of 92.5 percent pure silver. Marks on items that are made of sterling silver reflect the word “sterling” or “925”.
https://jewelrymakingjournal.com/silver-and-gold-metal-quality-marks/
Most of these markings are straightforward such as 14k means 14 karat gold and 925 means sterling silver. But sometimes the stampings seen on gold or silver may not be so obvious. Gold is more likely to have an array of different stampings. Gold is measured in …
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.thoughtco.com/metal-jewelry-stamps-and-marks-608017
Feb 12, 2020 · Jewelry made from precious metals is often stamped with a mark to indicate the chemical composition of the metal. A quality mark contains information about metal content that appears on an article. It is usually stamped or inscribed on the piece.Estimated Reading Time: 4 mins
https://ezinearticles.com/?How-To-Read-Jewelry-Marks&id=567855
The PR marks are just the Maker or Store ID or even a design mark, and have no relevance to the Value. The basic decimal formula to work out the quality of gold content is quite simple, as they are all measured in 'Parts per Thousand.'
https://en.mimi.hu/jewelry/quality_mark.html
Quality mark quality marks - Symbols stamped on articles made of precious metals, prescribed by law or by regulationsof government bureaus, to inform and protect purchasers as to the quality of metals in goods offered for sale. The quality of goldis indicated by karat-figures.
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