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 Early Victorian Aquamarine and Gold Girandole Brooch Antique Sapphire and Diamond Cluster Ring Pair of Art Deco Ruby and Diamond Scroll Earclips Pair of 18ct Gold and Rock Crystal Cufflinks by Verdura Pair of Cabochon Sapphire, Diamond and Blue Enamel Cufflinks