Black Diamond is a term used to refer to a variety of materials, including SKI equipment, carbonado, COAL, and ANTHRACITE. SKI is a three-letter word that refers to the sport of skiing, which involves sliding down snow-covered slopes on skis. Carbonado is a nine-letter word that refers to a type of diamond found in Brazil and the Central African Republic. COAL is a four-letter word that refers to a combustible black or dark brown rock made of carbon and other elements. ANTHRACITE is a ten-letter word that refers to a hard, glossy black COAL that burns with little smoke. Lil is a three-letter word that is a shortened form of the name Liliana.