Real Natural Black Diamond Ring With Matching Real Natural Black Diamond Stud Earrings. Black diamonds share the same symbolism as other diamonds, but also have a unique meaning of their own. Like white diamonds, black diamonds are thought to symbolize purity, love, fidelity, and eternity. Then, they're also thought to be a symbol of power, charisma, certainty, and passion. Dimensions: 1.12cts, 6.42mm Real Natural Black Diamond Engagement Ring-Size 7; 1.36tcw Real Natural Black Diamond Stud Earrings View Photos for Further Details.