A Rare Russian Aquamarine & Diamond Gold & Silver Brooch , circa 1905 by A. DENISSOFF- DURALSKY & Co. St. Petersbourg Morska,
eight gold claw-set with a large step-cut stone of bluish/green colour, probably of Russian origin, within a lobed four-sided mount collet-set with four principle old-cut diamonds and rose diamonds, presented in original holly wood box with cream velvet & silk lining .

This Brooch needs further research before selling as it looks like a typical of similar brooches made in the Faberge workshops

https://www.bonhams.com/auction/24242/lot/80/a-gold-aquamarine-and-diamond-brooch-faberge-moscow-1899-1908-with-scratched-inventory-number-29190/