A blister pearl and diamond brooch, designed as a duck, its body set with a blister pearl and

A blister pearl and diamond brooch, designed as a duck, its body set with a blister pearl and cushion-shaped, brilliant- and rose-cut diamonds, its eye set with a cabochon ruby, mounted in silver and gold, length 3.2cm, blister pearl untested, some diamonds later replacements

In good condition, blister pearl untested, measuring ≈19.9 x 12.8mm, closed-back setting its surface with fair lustre, white body colour with white overtones, surface with natural motlling and minor imperfections. Diamonds bright and lively, some replaced with modern brilliant-cuts. Typical blackened discoloration of silver. Gross weight ≈7 grams.