I hold Roberto Coin personally responsible for my latest jewelry obsession: black gemstones. Whether diamonds or sapphires, I don’t discriminate. These white gold Black Sapphire Diamond rings from Coin’s Fantasia collection are some of my favorite black Sapphire pieces. Black sapphires are among the rarest of sapphires and Roberto Coin has showcased them in a unique and incredibly exquisite fashion. Both of these rings boast curvy organic designs made with the eye-catching contrast of the diamonds and black sapphires, making them both excellent additions to any woman’s jewelry collection. And if you like the rings, why not pick up the matching bracelet too?