If The Crown was 27 Dresses, Elizabeth would be Katherine Heigl's character: high-strung, martyr complex, unable to relinquish control, stickler for the rules at all costs. Margaret's the fun sister played by Malin Akerman: a bit irresponsible, flirty, feisty, and determined to be the life of the party.
Although cassia oil can be a skin irritant, it does have some good properties and this warm exotic oil is more than just a fragrant oil, as it can be used in fever, chills and for supporting the digestive system. Cassia oil has a warm pungent smell.
Cassia is a spicy note coming from the Cinnamonum cassia, while cassis refers to a synthetically recreated berry-lychee perfumers' base much used in 1980s and American perfumery with a nod to blackcurrant buds (bourgeons de cassis in French).