A CONTEMPORARY AMETHYST AND DIAMOND BANGLE, BY MICHELE DELLA VALLE Set with a large rectangular-cut amethyst measuring approximately 33.00x25.28x16.52mm, enhanced with brilliant-cut diamonds, the band composed of titanium highlighted with circular-cut diamonds of black tint, mounted in 18K gold and black titanium, signed Michele della Valle, Italian registry mark, with maker's case, inner circumference approximately 15cm