wonderful unusual genuine black onyx round slider pendant on 18 " ( 45cm) blackened rope chain necklace - pendant can of course be worn separately - slider opening at the back will allow for chains up to 4 mm diamter - the pendant itself is a nice round big shiny onyx stone - diameter of stone 2.6 cm, the chain is 2 mm in diameter and the necklace weighs 15.4 g in total - our lovely packaging is of course included too xxx