The ornamental design for a locket, as shown and described.
FIG. 1 is a front perspective view of a locket showing my new design.
FIG. 2 is a first rear perspective view of the locket of FIG. 1.
FIG. 3 is a front elevation view of the locket of FIG. 1.
FIG. 4 is a right side elevation view of the locket of FIG. 1, with the left side elevation view being a mirror image of the same.
FIG. 5 is a top plan view of the locket of FIG. 1.
FIG. 6 is a rear elevation view of the locket of FIG. 1; and,
FIG. 7 is a second rear perspective view of the locket of FIG. 1 shown in a position of use strung on an unclaimed ribbon drawn in broken lines.
The dot-dot-dash broken lines illustrating a ribbon in FIG. 7 depict environmental subject matter and form no part of the claimed design. The dot-dot broken lines illustrating a pattern on the front surface of the locket in FIGS. 1 and 3 are part of the claimed design.