Invisibly-set ruby and diamond flower brooch, Aletto Brothers

The center of the flower set en tremblant  with a cluster of 16 round diamonds, the petals invisibly-set with numerous square-cut rubies, the stem and leaf set with 30 round and 9 baguette diamonds, the back of the flower studded at intervals with 6 additional round diamonds, the total diamond weight approximately 8.50 carats, mounted in 18 karat gold and platinum, stem detachable, signed Aletto Bros., numbered 90106. With signed box.