It designates that the installation adjustment component of the treasure ornament item whose installation characteristic is high without impairing fine view characteristic is offered as purpose. Together, it designates that the protective component which prevents the soiling and deterioration of back of the treasure ornament item is offered as purpose. This invention, portion of the treasure ornament item installation adjustment component or entirely, by the fact that it has the deformation possible liquid absorber for example like the water absortion power polymer, variable being able to point to wall thickness, is a feature in improving adhesion. The ring, annulation of the bracelet and the watch etc or it is possible according to this invention, without being conspicuous from outside, to raise the installation characteristic of the treasure ornament item which displays arc-shaped.
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