1/2 Carat Genuine Black Diamond Stud Earrings - $59 + FREE Express Shipping. 2 stunning genuine round black diamonds are set on high quality basket settings made of smooth .925 sterling silver. This season's hottest jewelry look. 2 Diamonds weigh .50 carat in total. Earrings secure with standard push back posts. The black diamonds are genuine, surface clean stones with no major visible inclusions. The high quality stones have a luster and visible shine that is guaranteed to last forever. A beautiful pair of natural gemstone earrings, great for everyday wear. Each stone weighs .25 carats for a total weight of .50 carat.