The ornamental design for a jewelpiece for handbag, as shown and described.
FIG. 1 is a front perspective view of a jewel piece for handbag showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken line showing of the grommets, handle rings, zipper, zipper track, and portions of the handbag is for illustrative purposes only and forms no part of the claimed design.