A ceramic matrix composite (CMC) consists of ceramic fibers embedded in a ceramic matrix. An alternative name is ceramic fiber reinforced ceramic (CRFC). The common types of ceramic used are carbon, silicon carbide, alumina, and mullite. Laser processing of ceramic matrix composites can be performed using a 1.06 micron fiber laser. Laser processing of ceramic matrix composites with a 9.3 or a 10.6 micron CO₂ laser is not feasible due to the poor absorption of the ceramic material at those wavelengths. Laser marking can vary depending on the core ceramic type used. Typically, the non-carbon based ceramic matrix composites mark with a gray to brown mark which is easily readable. Carbon based ceramic matrix composites mark with a light gray mark that contrasts with the dark ceramic material. Laser engraving or laser cutting of ceramic matrix composites is not recommended with the 9.3, 10.6, or 1.06 micron lasers as the material does not significantly ablate at these wavelengths.