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https://hunterridgeacquisitions.wordpress.com/2014/06/27/the-difference-between-silver-sterling-silver-900-silver-800-silver-alpaca-nickel-silver-and-silver-plated-jewelry/
Jun 27, 2014 · 999 (99.9% silver or 999/1000) As mentioned above, fineness can also be indicated by a word. The two most common words encountered in the United States are “Sterling” and “Coin”. Sterling is, as discussed above, 92.5% silver. “Coin” means that the item is 90% silver.
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,” …
https://www.jewelryshoppingguide.com/what-is-platinum/
Platinum used in jewelry, like this ring, is generally of higher purity than gold. Some common platinum hallmarks are: 950 Plat or 950 Pt. - The metal is at least 95% pure platinum and 5% alloy metals; 900 …
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 …
https://thinkengraved.com/blogs/news/a-guide-to-what-jewelry-stamps-mean
Jul 19, 2018 · 90% platinum or 900 parts per 100. Usually mixed with other platinum metal group alloys such as Ruthenium, rhodium, or palladium. 950 platinum will simply carry 950 in place of …
https://quickjewelryrepairs.com/articles/jewelry-stamps-what-do-they-really-mean/
900, 900PT, or PT 900 all signify that the metal used is 900 parts per 1,000 pure platinum, while 950, 950PT, and PT950 denote 950 parts per 1,000 are pure platinum. 925 – a piece with this stamp is …
https://www.leaf.tv/articles/what-is-the-meaning-of-numbers-on-jewelry/
The definitive marking for fine silver jewelry is “Sterling” which is .925 pure silver, mixed with minimal base metals. It is commonly marked “925”. A "900" stamp on silver tells you that it is 9 parts pure …
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