A ruby, emerald and diamond brooch, designed as a butterfly in flight, its wings partially

A ruby, emerald and diamond brooch, designed as a butterfly in flight, its wings partially articulated, its antennae mounted en tremblant, set with single-cut and baguette diamonds, circular-cut rubies, channel-set with lines of calibré-cut emeralds, and brilliant-cut diamonds of yellow, brown and greenish tints, mounted in white gold, length 8cm, diamonds not tested for natural colour origin, case