An item of jewelry having a base element and at least one gem which is mounted so that it can be moved in the base element such that the gem can move with respect to the base element, The gem is arranged, at least in areas, in a recess of the base element and is secured by at least one retaining element to prevent falling out from the recess. The retaining element extends from the base element slightly over one part of the upper side of the gem such that the center of the upper side is not covered b the retaining clement.

Mechanism (1) for moving an object (11), which is suitable for being integrated into a wearable jewellery or costume jewellery item (3), comprising:a manual drive source (5) which is capable of being driven directly or indirectly by an action of a user and which is arranged to drive a transmission (9) following an action of a user;a support system (13) which carries an object (11) which is intended to be moved in rotation about a first rotation axis (A1) under the effect of the manual drive source (5) by means of the transmission (9), characterised in that the support system (13) comprises a first frame (13b) which is mounted so as to pivot on a frame element about the first rotation axis (A1), and an internal frame (13f) which is mounted so as to pivot in the first frame (13b) about a second pivot axis (A2) which is substantially orthogonal to the first pivot axis (A1); and in that the object (11) is arranged to be driven by an eccentric drive element (15b) which is rigidly joined in rotation with a driving wheel (15) which is arranged to be driven by the transmission (9).

A watch glass includes a first glass, second glass and a decorative element, in particular a gemstone. Here, the first glass and the second glass are connected to one another via a connecting intermediate layer. The first glass includes a continuous recess. The decorative element includes a base region, which is arranged settingless in the recess of the first glass and in direct contact with the connecting intermediate layer. Further, a watch can include such a watch glass.

An article of dynamic jewellery includes a protective housing having an interior and a viewing window through which the interior is visible. A pendulum is suspended within the interior of the protective housing. The lower end of the pendulum supports an ornament which gives the pendulum sufficient weight that the pendulum swings freely in response to movements of a wearer's body.

The invention relates to an item of jewelry, comprising a fastener (2), an outer part (3), and an inner part (4) rotatable therein. The fastener can move in a reciprocating manner relative to the outer part, and an entrainment means (5) is provided between the fastener and the inner part in order to rotate the inner part in one direction when certain movements are made.