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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 …Estimated Reading Time: 3 mins
https://www.americangemsociety.org/precious-metal-jewelry/
The quality markings for platinum are based on parts per thousand. For example, the marking 900 Platinum means that 900 parts out of 1000 are pure platinum, or in other words, the item is 90% platinum and 10% other metals. The abbreviations for platinum — Plat. or Pt. — also can be used in marking jewelry.
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 “850” has 85 percent platinum.
https://www.upcounsel.com/jewelry-trademarks
Oct 30, 2020 · Platinum is usually stamped with the abbreviation PLAT or PT. Gold-filled jewelry is covered with a layer of at least 10-karat gold, and it's often stamped with G.F. or R.G.F. G.E. stands for Gold Electroplate. Pure gold is 24 karats, and it's stamped with 999 or 24k. 20-karat gold is stamped with 833 for its 20 to 24 or .833 gold to alloy ratio.Estimated Reading Time: 6 mins
https://www.wikihow.com/Identify-Platinum-and-Silver-Jewelry
Feb 24, 2011 · Platinum is a very rare and expensive metal. Therefore, all platinum jewelry will be marked to show authenticity. Look for the words “Platinum," “PLAT," or “PT” followed or preceded by the numbers “950” or …100%(3)
https://www.rough-polished.com/en/expertise/12974.html
Nov 14, 2007 · Platinum alloys have three assay numbers - 950, 900 and 850 – and two types of metal denomination – Pt and Plat., for instance “900Pt.” The U.S.A. has a special hallmarking law, the National Stamping Act, but it refers to bank ingots.
https://www.leaf.tv/articles/how-to-identify-gold-silver-and-platinum-metals-like-a-jeweler/
Identify sterling silver by finding the number 925. Some items that appear to be gold but have the 925 stamp are made of gold-plated sterling silver. Identify platinum by using this list: Plat 900 PLAT 950 PLAT 10% IRID PLAT 10% IRID 90% PLAT COPLAT. Identify Palladium by the marking PD. Look at what is stamped after the markings I listed above ...
https://goodjewelleryguide.com/jewelry-hallmarks-guide/
The first requirement for all jewelry to be found on the market is to have these marks. There are some generally accepted rules and signs around the world. If you have gold jewelry, you should see markings like 18k, 14k, 10k, 750, 585, or 375. If you have silver jewelry, you should see markings like 925 or 800.
https://quickjewelryrepairs.com/articles/is-platinum-jewelry-worth-buying/
This platinum ring is extremely scuffed and worn. Platinum is ranked as the top metal out of all of the silvery-white jewelry metals, and with good reason. Its color does not change, and jewelry-grade platinum is commonly rated as 90-95% platinum content. In contrast, other metals such as white gold may only contain about 40 to 50% gold content ...
https://www.macys.com/shop/featured/platinum-jewelry
Platinum, 18k Rose Gold and 18k Gold over Sterling Silver Earrings, Extra-Large Tri-Color Hoop Earrings $400.00 (26)
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