Method for fabricating a ceramic-based timepiece or jewellery component with a structured decoration, in which a basic cycle is performed at least once, including, in this order, the following steps: - in an initial operation, making a base from a substrate made of ceramic material; - in a first polishing operation, mirror polishing said base, at least on apparent surfaces intended to be seen by the user; - in a second machining operation performing laser machining and/or mechanical machining with a diamond tool and/or abrasive machining to produce a first fine-pattern etch of at least some structured surfaces having a surface relief extending between peaks and valleys, or a Guilloché, or sunray, or chased, or engraved, or perlage, or snailed, or circular grained, or anglage, or satin, or drawn, or concave chamfered finish, or Côtes de Genève, or Clous de Paris; - in a first preparation operation, performing a first coating operation wherein at least one portion of said surface relief is coated with a first thickness E of at least a first layer of a first metal decorative treatment and/or coloured decorative treatment material, and performing, prior to or after said first coating operation, a second machining operation during which deep etching is performed to produce a first hollow decoration with a depth P greater than said first thickness E and penetrating said base beneath said apparent surface and beneath said valleys of said surface relief; - in a third machining operation, performing laser ablation on said first layer in pockets at the bottom of which the ceramic material of said base is revealed; - after said third machining operation, a second coating operation is performed wherein all of the visible surfaces of said component are coated with a deposition of a second layer of a second treatment material. - in an initial operation, making a base from a substrate made of ceramic material; - in a first polishing operation, mirror polishing said base, at least on apparent surfaces intended to be seen by the user; - in a second machining operation performing laser machining and/or mechanical machining with a diamond tool and/or abrasive machining to produce a first fine-pattern etch of at least some structured surfaces having a surface relief extending between peaks and valleys, or a Guilloché, or sunray, or chased, or engraved, or perlage, or snailed, or circular grained, or anglage, or satin, or drawn, or concave chamfered finish, or Côtes de Genève, or Clous de Paris; - in a first preparation operation, performing a first coating operation wherein at least one portion of said surface relief is coated with a first thickness E of at least a first layer of a first metal decorative treatment and/or coloured decorative treatment material, and performing, prior to or after said first coating operation, a second machining operation during which deep etching is performed to produce a first hollow decoration with a depth P greater than said first thickness E and penetrating said base beneath said apparent surface and beneath said valleys of said surface relief; - in a third machining operation, performing laser ablation on said first layer in pockets at the bottom of which the ceramic material of said base is revealed; - after said third machining operation, a second coating operation is performed wherein all of the visible surfaces of said component are coated with a deposition of a second layer of a second treatment material.