Double-purpose brooch

Pear-shaped gold brooch set with 19 diamonds, fitted with a hook clasp. The front is set with a rose diamond, mounted and foiled in silver. The central stone is an oval rose diamond set in an entourage of 18 rose diamonds. Straight bands run from the center to all sides. The ends are set with 18 different rose diamonds. The brooch is accompanied by a ring in which the central diamond can be set, and a screwdriver with a bone handle.