Genuine Tahitian pearl strand necklace features pearls with off round shape, 8.5 - 10.5 mm in size ( gradually increases from back to front), natural gray overtone black color, some natural flaws on the surface. 17.5 in length.Professionally hand knotted, 925 silver clasp. The overall quality grade of the pearls is AA- under A - AAA+ quality grading system. item#: nk210