Emerald cut aquamarine with round sapphires and round diamonds set in platinum and 18k yellow gold in this Oscar Heyman estate brooch.  Weight of the aquamarine is 156.51 carats.  Total weight of the sapphires is 13.38 carats.  Total diamond weight is .08 carat.  Since this is from an estate and one of a kind, its availability is subject to prior sale.