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pt950 means that the ring is Platinum (PT on the Periodic Table) and 950/1000 for purity which makes it 95% pure platinum. 18 karats is about 75% of the precious metal, and 25% something else, so the platinum component in your ring is almost 24 karats, very pure, only 5% non-precious metal. The 750 on your ring should bereferring to gold, in that your gold is 18 karat, IE 75% precious metal. Usually when I've seen markings for platinum and gold, it means the ring is 2 tone, is that the case here? It should have both gold and platinum visible on it? I am in no way an expert, but this is the information as i know and understand it. Here are some links that might help clarify for you.

http://en.wikipedia.org/wiki/Carat_(purity)

http://www.pricescope.com/idealbb/view.asp?topicID=6681

http://engagementrings.pricescope.com/platinum.asp (just for a little extra platinum info)

I hope all this helped :-/

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10y ago

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