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 Antique Diamond Bull Stickpin (Copy) Edwardian 9ct Gold Stock/Tiepin Antique Sapphire and Diamond Cluster Ring Pair of 18ct Gold and Black Enamel Cartridge Cufflinks 18ct Gold Half-hunter Pocket Watch by Clarke