Two ways to develop sets

White - nests, black - ancient set
Season 4 sets have two development paths. White things are socketed: sockets and spheres. Black copies of the same sets are ancient: Jewel of Ancient gives them an ancient set. The paths do not mix: an ancient stone does not stand on a thing with nests, and black things do not receive nests.
Excellent options are added by Jewel of Excellent - on any of the two paths.
Season 4 sets have two development paths. White things are socketed: sockets and spheres. Black copies of the same sets are ancient: Jewel of Ancient gives them an ancient set. The paths do not mix: an ancient stone does not stand on a thing with nests, and black things do not receive nests.
Excellent options are added by Jewel of Excellent - on any of the two paths.

White - nests, black - ancient set