The invention concerns a Lyocell fiber, containing a material selected from the group consisting of pearl powder, ground nacre and mixtures thereof. For the manufacture of the fiber according to the invention, a process is used comprising the steps of manufacturing a spinning solution of cellulose in an aqueous tertiary amine oxide, preferably N-methylmorpholine-N-oxide (NMMO) spinning the spinning solution to fibers, and being characterized in that a material selected from the group consisting of pearl powder, ground nacre and mixtures thereof is admixed to the spinning solution and/or to a precursor thereof.