Update: It has been 4 years and the necklace looks great without tarnishing.
I bought this necklace for my mother-in-law for Christmas in 2010 for under $50. I have seen her wear it frequently and she seems happy with it. She even shed a tear or two considering my father-in-law had just passed away a couple months prior to Christmas. No tarnishing or discoloration, looking as new as the day I bought it.  I highly recommend this product.