A gem-set Blackamoor brooch, depicting a bust of a Blackamoor, with a carved ebony head, in a textured turban and robe embellished with turquoise cabochons and single-cut diamonds, double-prongs brooch fittings to the reverse, unmarked bi-coloured metal testing as 18ct, overall dimension 4.5 x 2.2 cm, 15.9 grams.