The ornamental design for equine jewelry, as shown and described.
FIG. 1 is a perspective view of equine jewelry, showing my new design;
FIG. 2 is an alternate perspective view thereof, illustrating the design as applied to a commemorative coin; and,
FIG. 3 is a front elevational view thereof.
The broken lines shown in the drawings represent environmental matter and form no part of the claimed design. The top surface of the equine jewelry is flat.