Jewellery › Edwardian Banded Agate and Diamond Shell Stickpin Image 1 of 1 Edwardian Banded Agate and Diamond Shell Stickpin £1,400.00 The hardstone scallop shell set to the centre with an old mine-cut diamond Reference. SN7527 Add To Cart Added! The hardstone scallop shell set to the centre with an old mine-cut diamond Reference. SN7527 You Might Also Like Edwardian Sapphire and Diamond Cluster Ring Carnelian and 18ct Gold Frog Ring 18ct Gold Rose Brooch Morganite and Ruby Gypsy Ring Victorian Diamond Rectangular Panel Brooch