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https://www.specialtymetals.com/blog/2016/6/9/how-to-recognize-platinum-when-you-see-it
Jun 09, 2016 · Send It to Us for Testing. If you have a silver-toned item that could be made of platinum, call us at 800-426-2344 and ask us to test it for you. When you do, ask about shipping costs. Your items could qualify for free or discounted shipping when you send them to us.Estimated Reading Time: 2 mins
https://kipkis.com/Identify_Platinum_and_Silver_Jewelry
Feb 05, 2018 · 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 “999”. These numbers refer to the purity of the platinum, with “999” as the most pure.
https://www.aupreciousmetals.com/how-can-i-tell-if-my-items-are-gold-platinum-or-silver
The colors of platinum and silver jewelry are very similar. The most reliable way to tell if your item is silver, platinum or fake is to take it to a certified refiner. If you want to check for yourself, look for the following assay markings:Estimated Reading Time: 2 mins
https://www.leaf.tv/articles/how-to-identify-a-platinum-ring/
Use a platinum metal test kit. Metal test kits use acid to check for the existence of platinum. Rub the ring on a test stone, and add a drop of acid to the metal streak on …
https://www.sellyourgold.com/faq/my-items-gold-silver-or-platinum
An oval stamp would indicate the item is silver. A 'house' shaped mark is used for platinum items. The number inside the shape is called the millesimal stamp number - this will tell you the actual precious metal content or the purity of the precious metal.
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