6.5mm x 7mm Round True AAA Quality Black Green Freshwater Cultured Pearl Necklace from China with a Silver clasp. These pearls are the finest quality high grade freshwater pearls in the marketplace. You can count on Brilliant Pearls for the roundest, cleanest cultured freshwater pearls available. Every strand is hand-knotted on double stranded silk thread with double knots. Longer lengths are available.