Method for producing a multi-decoration and/or multicoloured horological component having a ceramic structure

A Method for manufacturing a heterogeneous horological component (100), according to which a structure (1) made of a first material, which is a hard material or a ceramic, is obtained, or such a structure (1) is produced, which structure (1) comprises at least one primary cavity (10), or in which structure (1) at least one primary cavity (10) is produced, then said at least one primary cavity (10) is fully or partially filled with a second material that is different in appearance from said first material in order to produce a primary insert (2), wherein at least in the thickness of said second material of said primary insert (2), at least one secondary cavity (20) is produced, which is fully or partially filled with a third material that is different in appearance from said first material and/or from said second material in order to produce a secondary insert (3), and wherein at least one said primary cavity (10) is produced during the production of said structure (1), in that only the periphery of this said primary cavity (10) is re-machined or laser machined, and in that the bottom of this said primary cavity (10) is left rough before being filled with said second material.