Pearlz Ocean Black Onyx Knotted Endless Necklace This beaded necklace from Pearlz Ocean features the shiny and pure blackness of onyx beads. Each bead is 10 mm and individually knotted. Measuring 36", the versatile endless design offers easy slip-on styling. Necklace measures 36 inches long Clasp free design offers comfortable wear while the length allows the necklace to be doubled for a different look Be sure to check out our other freshwater pearl necklaces, available in a variety of colors!