Jamaican Mango & Lime Jamaican Black Castor Oils are powerful all purpose healing oils made from Jamaican Castor Beans roosted and ground manually then boiled to produce 100% pure organic oil. Jamaican Black Castor Oils are pure and unrefined, retaining all their nutritive properties making them great as a skin softening, moisturizing massage oil or as a hot oil treatment for dry damaged hair, hair growth, and thinning hair.