Crystal Ball

FIG. 1 is a front, left, top perspective view of a crystal ball embodying our new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a back plan view thereof;

FIG. 4 is a left-side plan view thereof;

FIG. 5 is a right-side plan view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line showing is included for the purpose of illustrating portions of the “article” and forms no part of the claimed design.