I bought 2 off Amazon and have worn them for about 2 years- no green or fading of metal. I'm assuming they are, in fact, real silver (which isn't always the case). I have worn them in the ocean, pools, and baths daily. I love them! I have a 2mm one and a 3mm one

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https://www.amazon.com/gp/product/B071D3PVJR/ref=ppx\_yo\_dt\_b\_search\_asin\_title?ie=UTF8&psc=1