PIECE OF JEWELLERY Russian patent published in 2011 - IPC A44C17/00 

FIELD: personal use articles.

SUBSTANCE: invention relates to jewellery, namely, to pieces of jewellery made of precious and semiprecious stones. A piece of jewellery comprises a substrate made in the form of a spherical body with smooth outer surface and a core, preferably a pearl, with a radially arranged cone-shaped seat, in which the base is located near the outer surface of the substrate, and the top is located inside the substrate core. The piece of jewellery comprises a smooth or a faceted insert, preferably a precious or a semiprecious stone, made of a pavilion fixed with the help of a fixing agent in the substrate seat, a girdle and a crown. In the substrate core in the area of the seat top along the axis (0-0) of the substrate there is a hole provided, where the top of the insert pavilion is installed. The base of the substrate seat is made with a groove, where the girdle and the crown of the insert are placed. The diameter (d) of the hole made in the substrate core in the area of the seat top along the axis (0-0) of the substrate is selected as equal to 0.1-0.9 of the diameter (D) of the substrate seat base. The diameter (d₁) of the substrate seat base deepening is selected as equal to 1.01-1.20 of the diameter (D₂) of the insert girdle, and the depth (h) of the substrate seat base deepening is chosen as equal to 0.8-2.0 of the sum of heights (h₁+h₂) of the girdle (h₁) and the crown (h₂) of the insert.

EFFECT: invention increases reliability of insert fixation in the substrate seat.

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