Arena AGADZHANYAN - Belgium Necklace that can be worn as a tiara in silver and 18k (750 thousandths) yellow and white gold. The detachable central part is a piece of early 19th century jewellery modernised by the addition of stones such as a large natural amethyst weighing approximately 10.50 ct, treated orange and yellow sapphires and small diamonds (missing). ALGT report of the jewel dated 29 September 2021 nr. 10081618. Dimensions of the central part: 12 x 9 cm. Gross weight: 34.8 g.