Necklace by Diesel, Leather cord, Textured dog-tag pendant, Lobster clasp fastening, 100% Real Leather. Founded by Renzo Rosso in 1978, Diesel has since become a part of global youth culture, with its pioneering new styles and creative design methods. Known throughout the world for their jeans, Diesel now boasts a full clothing and accessories line that embraces the label's inimitable laid back style.