Abstract: Gemstone (1) having a back (2) tapering to a tip (3), and a front which is cut in a faceted manner (5), wherein regions opposing said tip (3) being mirrored (12).

Abstract: A sequin (4), comprising a carrier layer (1), a gemstone (2, 3) or a plurality of gemstones (2, 3) being arranged on one side of the carrier layer (1).

Abstract: Method for gluing decorative stones (1) with a tapered off backside, in particular of faceted glass, onto leather (2), wherein in the fastening region of each stone (1) a recess (5) is punched out of the leather (2), which recess is smaller than the greatest diameter of the stone (1). The end of the recess (5) facing the stone (1) is expanded by stamping corresponding to the contour of the stone (1). The stone (1) is subsequently glued in the expansion (6) to the base layer (4) of the leather (2).

Abstract: Light-emitting device (1) comprising a body which is at least substantially transparent in the visible spectral range and a light-generating device (5) which is arranged outside the body, wherein a light-emitting region is formed inside the body and wherein there is formed in the body, as a result of the arrangement of a medium having a lower index of refraction, at least in certain portions a substantially polyhedral, cylindrical or conical interface (6) which totally reflects radiation (4) which has been emitted by the light-generating device and entered the body, at least in certain portions, wherein this totally reflected radiation (4?) issues from the body so as to at least partly form the light-emitting region, wherein the interface (6) forms a cavity (3) inside the body.