A 19th century diamond and painted miniature necklace

A 19th century diamond and painted miniature necklace
Designed as a rose-cut diamond and blue enamel graduated panel necklace with rose-cut diamond five stone clasp, set in the centre with a oval panel, the central portrait of a young women three quarter facing painted en grisaille within rose-cut diamond border to a rose-cut diamond crown border flanked by two other heart shaped panels each with matching painted profile heads of a young women within rose-cut diamond borders and crown surmounts, suspending seed pearl and enamelled flower head chain-link swags, approximately 41.0 cm. long