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. La présente invention concerne donc une composition solide, notamment de revêtement des matières kératiniques, plus particulièrement de maquillage et/ou de soin des matières kératiniques, telles que la peau, sous forme de poudre compacte, notamment comprenant un milieu physiologiquement acceptable et contenant au moins : - une phase huileuse dans une quantité d'au moins 20 % en poids par rapport au poids total de la composition ； ladite phase huileuse comprenant au moins une huile de silicone non volatile non phénylée ； et - une phase pulvérulente
