18 k. Gold Grand Tour micro mosaic necklace 'en esclavage', early 19th century. with Arcadian landscapes against a background of malachite. (Mosaic and malachite slightly damaged) With French import hallmark. A similar necklace is in the collection of the Victoria & Albert Museum, see http://collections.vam.ac.uk/item/O157741/necklace/necklace-antonio-aguatti/