The ornamental design for an ornamental bead item, as shown and described.
FIG. 1 is a front three-quarter perspective view of the ornamental bead item, illustrating several of the same elliptical bead along a necklace, with elongated apertures upon each bead that expose the string upon which the beads are mounted; and,
FIG. 2 is a top three-quarter perspective view of the ornamental bead item, again illustrating several of the same elliptical bead along a necklace, in this instance with elongated apertures towards the front of each bead, exposing the string upon which the beads are mounted.