The Fragrance wheel is frequently used as a classification tool in perfumery. Delta Aromatic has created its own Fragrance wheel, a circular diagram that depicts every scent family. A scent family is a group of scents that have been put together because of their similarities and complementary differences. Scent groups that are closest together share characteristics in their fragrances, while scent groups that are further apart on the wheel are less closely related in terms of fragrance.