Black and White Diamond Infinity Pendant-Necklace in Sterling Silver 1/4ct tw Natural diamonds, black diamonds are heat-treated black, white diamonds are not treated. 18" Sterling Chain .925 sterling silver setting. Pendant measures 3/4 inches high including the bale All of our diamond suppliers and MLG state that to the best or their/our knowledge that all of our diamonds are conflict free. Natural diamonds, black diamonds are heat-treated black, white diamonds are not treated. 18&#034; Sterling Chain .925 sterling silver setting. Pendant measures 3/4 inches high including the bale All of our diamond suppliers and MLG state that to the best or their/our knowledge that all of our diamonds are conflict free.