I love this necklace! I have worn it in the pool, lake, river, shower, summer water balloon fights, all the works, and it has not turned green at all! I also have a significant nickel sensitivity and after wearing, there is no sign of any rash or allergic reaction otherwise. My only hesitation is the length of the chain. The necklace is beautifully dainty but is definitely close to a choker length on me. It would be easy to adjust or add a few links to make it juuuust a tiny bit longer if you reSee full review