The ornamental design for a set of sphereclusters for use in contemplation and meditation, as shown.
FIG. 1 is a top perspective view of the set of sphere clusters for use in
contemplation and meditation when adjoined, showing my new design;
FIG. 2 is a top perspective view of the set of sphere clusters for use in
contemplation and meditation when separated into its two component sphere
clusters;
FIG. 3 is a top plan view of one of the component sphere clusters, all six
faces being identical to the one shown; and,
FIG. 4 is a top plan view of the other component sphere cluster, all six
faces being identical to the one shown .