Sterling Silver Black and White Diamond Key Pendant-Necklace .925 sterling silver with heat treated black and natural white diamonds. Pendant measures 1 1/4 inches high 18 inch Sterling Silver Chain Black diamonds are natural diamonds, heat treated black. White diamonds are natural and not treated. .925 sterling silver- Rhodium Finished .925 sterling silver with heat treated black and natural white diamonds. Pendant measures 1 1/4 inches high 18 inch Sterling Silver Chain Black diamonds are natural diamonds, heat treated black. White diamonds are natural and not treated. .925 sterling silver- Rhodium Finished