Black and white diamond ring and necklace set

Ring is .25 CARAT IN GEMSTONES. WHITE DIAMONDS AND BLACK DIAMONDS. I am unsure of the ring size, but I believe it’s a 9. The Tilted Diamond necklace is white diamonds, and the chain is 9 inches long. Both worn only a handful of times so in decent condition but will need a good cleaning. I received from an ex boyfriend years ago so I don’t have any paperwork. The price reflects this.