Vintage Mikimoto 18K Gold 6.2mm - 6.4mm 20" Strand Necklace. The pearls are in excellent estate condition and ready to wear. They do not come with a box or pouch. The 18K yellow gold clasp is marked 750 and the Mikimoto makers mark. The pearls measure between 6.2mm and 6.4mm. They are round, white in color with high luster. The strand measures 20" long and weighs a total of 25.8 grams