Conflict diamonds are illegal and unethical to buy. Buying conflict diamonds is subsidizing a monster who cuts off little children’s arms. These “blood” diamonds come from war zones where crimes against humanity are committed daily. You will go to jail (and rightly so) if you buy such a diamond. But thanks to the Kimberley Certification Process, conflict diamonds are barred from the marketplace, so there is a zero percent chance you will find such a stone. Executive Order 13194, signed by President Bill Clinton, makes it illegal to transport, buy, and use such stones.