Rubedo is extremely overpriced for what it is. It's essentially 9kt gold. You can get 9kt gold for super cheap at department stores like Macy's. For my birthday I received a lovely gift from my friends, the Rubedo RTT link bracelet, and in a week, the area in between the links went black. It might have to do with the chemicals in my body, but none of my other jewelry has ever done that before (although I did have a pair of Tiffany earrings that were 18kt gold that turned colors on me too). I ended up returning the necklace and keeping the store credit...