Ladies, thank you all! You really helped me realize I've made the right choice returning the the diamond key, I just wasn't trilled about it anymore for whatever reason, and all I felt was gilt for spending so much for the price that I don't absolutely love. Certainly not the best feeling to experience when you put your necklace on...
I tried to list my old key on craiglist, but nobody was really interested, and it would break may heart to sell it twice cheaper then it cost me. And besides, my husband is very sentimental about all my jewelry, so I better keep I guess.
I think I'll probably go for jazz round necklace... I've tried it in store, and it was SO sparkly (because diamond are bigger in it), and the bezel shape is so clean and beautiful. It could go from day to night as well. The price for 0,51c Tiffanys diamonds is quite ok too... I'm a bit hesitating because the circle shape is not distinctively Tiffanys..., but others brands pendants just doesn't look that perfect to me... Do you think it worth it to buy it from Tiffanys?
Hmmm, now I'm a bit torn between this one and Garden flower pendant, which is smaller (0,25c), but has nice sparkle to it too...