Setting and method for setting a decorative assembly

A setting (1), comprising:

• an upper body (15), extending around an axis (A) defining a direction for driving said setting (1) into a bed (8) of a piece of jewellery or timepiece (9), and including a first surface (2) arranged to receive a component to be set (10), at least one setting element (4) arranged to ensure the holding of said component to be set (10), and, aligned with said upper body (15);
• a lower body (16) including a second front surface (6),
• wherein said setting (1) includes, at least between said upper body (15) and said lower body (16), at least one deformable area (7) that is plastically deformable under the action of a force at least axial imparted to said setting (1) in said driving direction in the defined direction from the upper body towards the lower body, greater than a predetermined driving force, to bring said setting (1) into a stressed state,
• wherein said at least one deformable area (7) is irreversibly deformed and/or fractured, in the form of a clot radially pushing back a peripheral surface (3) of said setting (1) towards a lateral wall of one said bed (8) during the application of said force, or/and in the form of a fault radially pushing back said upper body (15) towards one said lateral wall during the application of said force, and
• wherein said foot (16) is distinct from said upper body (15) to which it is fastened.