This lovely diamond cluster stud earrings feature 0.20 ct. black & white diamodn in prong-setting. All diamonds are Sparkling. Our product includes a complimentary jewelry box for safe storage and presentation. The Black Diamonds may have one or two small chips and or white spots. The black diamonds in this item are semi-faceted and natural. These black diamonds qualify as rose-cut or diamond accents. The black diamonds in this jewelry item are of not of gem quality, and contain varying number of facets from 0 to 16. Natural black diamonds are rare. Dazzlingrock sells only heat treated black diamonds, treated with the High Pressure Heat Treatment (HPHT) method. In HPHT treatment, diamonds are heated to approximately 1260 degrees, and the diamonds become black. HPHT treatment is completely safe and permanent.