Greatly carved & adjusted Quality Edwardian shell circa 1910th Unmarked Silver with Diamond(?) neck choker filigree Brooch

Huge masterly carved Art Nouveau shell circa 1910 - image of the young Beauty with a little diamond(?) neck choker, wrongly set and later adjusted by the sculptor. Total measures is 1-3/4” long by 2-1/8” high. Total weight is 17.18 grams. The perfect Antique condition from the Upscale Connecticut Collection.