A method for obtaining a decorative item (5) having a sparkling appearance, comprising the steps of: providing or producing a model (1) having a face (1a) of polycrystalline structure which is intended to be replicated; producing a replica (2) of the face (1a) using a polymer material; producing an object (4) on at least a portion of the replicated face (2a) of the replica (2); and at least one of locally modifying the polycrystalline structure of the model (1) before producing the replica (2); modifying the shape of the replica (2); and selectively producing the object (4) on certain portions of the replicated face (2a) of the negative replica (2), the decorative item (5) being either the replica (2), or the object (4) if the optional step is carried out.