Bests & Worsts Reviews from Amazon

Purchased this item a little more than a month ago for my niece's birthday. She's only worn this once and the bracelet was put away, because it was too nice to wear everyday, until a next proper occasion to wear again. The 18k "gold" section of the bracelet has rusted and/or has discoloration. See photos. I've contacted the seller... awaiting response. Will update later.