Joil stands for 'Jewel Oil Italian Luxury'. Produced by the house Gradassi, founded in 1639 in Spoleto, Umbria, under the brand name Cufrol. The black Moraiolo olive is a fairly rare Tuscan olive of which Cufrol makes this Premier Cru oil. They themselves speak of an "olive jewel". The oil is slightly peppery and spicy and is actually only used to sprinkle over dishes in order to enhance the deep taste.
