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 Full Eternity Ring Georgian Purple Sapphire Diamond Circular Cluster Ring Mid 19th-Century Ruby and Diamond Target Ring 18ct Gold Half-hunter Pocket Watch by Clarke Pair of 18ct Gold Queen’s Royal Lancers Cufflinks