A method for fabricating a composite component for horology or jewellery including making a base from a first material, with a first visible apparent surface, and a first support surface; a structure from a second ceramic, or sapphire or at least partially amorphous material, with a second apparent surface and a second support surface, including a through bore machined over the entire thickness thereof; at least one insert made of a third material, for each through bore, and arranged to fit together in a complementary manner with this through bore; bonding this base and each structure to each other, with each first support surface and each second complementary support surface bearing against one another; securing each insert with its respective through bore.