This lustrous display of natural freshwater black pearls measure 6mm-6.5mm and are double knotted to produce a high quality and durable necklace. Slightly Spotted Surfaces and Good Uniformity combine to create a beautiful natural piece that will be treasured forever. The necklace measures 18 inches in length and secures with a art deco carved 14K white gold clasp. Pearls Measure: 6mm-6.5mm This item comes with a Certificate of Authenticity guaranteeing the natural origins of all materials used