Abstract: A jewelry item includes a support element provided with inner and outer zones, first and second support surfaces having a resilience and facing one another with a taper from the inner to the outer zones. The taper provides a bisector extending along the axis of taper. First and second spaced recesses or protrusions are provided on each of said support surfaces. A collet for holding a stone or other item having first and second collet surfaces complementary to the first and second support surfaces, said collet surfaces having a taper substantially corresponding to the taper of the support surfaces, each of said collet surfaces including first and second spaced protrusions or recesses designed to cooperate and fit together with associated recesses or protrusions of the support surfaces. Said collet being fittable to said support. Each of said protrusions includes a surface extending substantially transverse to said bisector.