A diamond and conch pearl brooch. Sold for US$ 15,000 (€13,817). Photo: Bonhams.

in the form of a flower with conch pearl stamen accentuated by petals and stem of pavé-set round brilliant-cut diamonds;signed J. Stella; estimated total diamond weight: 12.30 carats; conch pearl weighing approximately: 30.00 carats; mounted in eighteen karat white gold; length: 3 3/4in.

Bonhams.  FINE JEWELLERY, 13 Dec 2011 12:00 EST, NEW YORK