Abstract: The invention provides a cosmetic material containing a crystalline superfine silk powder that has the original structure of silk yarn, properties such as an unique gloss, feeling of touch, flexibility, and elasticity; and various properties such as excellent coating power, spreadability, adhesion, feeling of touch, and formability, which are required of an extender powder or color material of cosmetics. The cosmetic material contains a colored crystalline superfine silk powder obtained by the steps of bringing a silk substance into contact with an alkali aqueous solution at temperatures ranging from 100° C. to 150° C. under a pressure ranging from 1 through 5 atmospheric pressures to weaken the silk substance to not greater than 0.