Black Beaded 3 layer necklace

Black Beaded 3 layer necklace 3 lengths of black beads - 2 shorter layers are irregular shaped and the 3rd longest layer has a gemstone cut oval octagon shape. Beads are separated by small silver colored balls. All on a black line that connects in back to a 4 inch chain that makes it adjustable. Lobster claw clasp. 19, 21 and 25 inches are the end to end lengths of each layer.