Lustrous freshwater cultured pearls ranging from 6mm to 7.5mm in size form this essential 18-inch necklace from the Sea Magic Cultured Pearls? by Mikimoto collection. The necklace fastens with a sterling silver fishhook clasp. A pair of 6.5mm freshwater cultured pearls set in sterling silver creates the matching stud earrings that have 14K white gold friction backs to complete the look.