For that critical question of your life, make it a special one with a Plain Shank Engagement Rings. This traditionally designed ring has been the couple’s choice for decades, and it is hard to ignore why. Plain Shank Halo engagement ring has a center diamond surrounded by smaller diamonds. It is a classic plain shank design but with a delicate halo of diamonds around the central stone. The traditional halo design involves using round and cushion-shaped diamonds for their vintage, romantic appeal. But modern couples are also going for double halos, compass points settings, and floral-designed halos.