The present invention thus relates to a solid composition, especially for coating keratin materials, more particularly for making up and/or caring for keratin materials such as the skin, in compact powder form, especially comprising a physiologically acceptable medium and containing at least: —；an oily phase in an amount of at least 20% by weight relative to the total weight of the composition； said oily phase comprising at least one non-volatile non-phenyl silicone oil； and —；a pulverulent phase in an amount of at least 40% by weight relative to the total weight of the composition； said pulverulent phase comprising at least mica particles； and —；at least one amorphous hydrocarbon-based block copolymer； said composition not containing any talc particles that have not been surface-treated and being able to be obtained via a process comprising the following steps: (i) the oily phase, the amorphous hydrocarbon-based block copolymer, the pulverulent phase and the volatile solvent(s) are mixed to form a slurry； and (ii) the slurry is formed in a container by compacting, in particular pressing and/or suction, to obtain the composition in powder form. The invention also relates to a process for coating keratin materials, more particularly for making up and/or caring for keratin materials such as the skin, characterized in that it comprises the application to the keratin materials of a composition as defined previously.
