The present invention therefore relates to a solid composition, in particular for coating keratin materials, more particularly for making up and / or caring for keratin materials, such as the skin, in the form of a compact powder, in particular comprising a physiologically acceptable medium and containing at least one 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-phenylated non-volatile silicone oil; and a pulverulent phase in an amount of at least 40% by weight relative to the total weight of the composition; said powdery phase comprising at least mica particles; and at least one amorphous hydrocarbon block copolymer; said composition not containing talc particle untreated on the surface and being obtainable by a process comprising the following steps: (i) mixing the oily phase, the amorphous hydrocarbon block copolymer, the pulverulent phase and the one or more volatile solvents to form a sludge; and (ii) shaping the slurry in a container by compacting, in particular pressing and / or suctioning to obtain the powdery composition. The invention also relates to a process for coating keratin materials, more particularly makeup and / or care of keratin materials, such as the skin, characterized in that it comprises the application to keratin materials of a composition such as than previously defined.
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