A nail polish composition comprises a cellulosic filmogenic polymer, a plasticizer and one or more solvents, and is characterized in that it includes 20 to 200% by weight, relative to the cellulosic polymer, of at least one second filmogenic polymer partially insoluble in the cellulosic polymer, giving rise to settling into at least two stable and separate liquid phases at rest. Preferably, the second filmogenic polymer is a vinyl resin, for example polyvinylbutyral. After agitation, this composition has a homogeneous appearance, and can be applied to the nails like a conventional polish.