Professional Products Unlimited Jamaican Mango and Lime Black Castor Oils Extra Dark are powerful all purpose healing oil made from Jamaican Castor Beans roasted and ground manually then boiled to produce 100% pure organic oil. Our 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.