MarbleX is for those seeking greater durability and avoidance of rusting and corrosion. MarbleX is a trade name for a non-metallic compound that includes ground marble particles. MarbleX product is premium grade and resists peeling, chipping and harmful UV rays. Being an injection molded material, marbleX is strong and lends itself to the production of fine design details. MarbleX is the most durable material available for making outdoor lighting fixtures.