A 戒指 铂金 500/000 镶嵌两颗凸圆形切割哥伦比亚祖母绿、玫瑰式切割钻石和一颗重约 1.91 克拉的仿古明亮式切割钻石，色泽等级 K~L，纯度 VVS，荧光强烈 里斯本印记（1938-1984 年）和金匠印记 Camilo Almeida Graça (1916-1972) (有磨损痕迹） 中号：16（欧盟） 7,5 g - - - 文献： VIDAL, Manuel Gonçalves; ALMEIDA, Fernando Moitinho de - "Marcas de Contrastes e Ourives Portugueses (1887 a 1993)", vol. II.里斯本：IN-CM, 1996, no.

Composed of several subsidiaries, the Drouot Group is a major player in the art market. Hôtel Drouot, located in the heart of Paris, has been the world's largest public auction center since 1852. 15 salerooms are available to more than 70 auction houses. The emulation generated by an annual offer of 230,000 artworks from 21 major specialities - from Antiquity to street art - attracts some 3,000 visitors every day. The Group's digital platform, Drouot.com, offers digital sales - Live auctions (live broadcasting and participation in auctions), Online-only auctions (dematerialised auctions) and Buy Now sales (sales of lots at fixed prices). Nearly 2 million items are offered annually by 600 auction houses. Auction news is reported every week in La Gazette Drouot, the leading weekly magazine for the art market and culture published by Auctionspress.