Wishlist Product French Retro 18K Gold Tank Bracelet Art Nouveau rose gold diamond ring A 19th century 18 karat rose brooch set with an approx. 5ct blue zircon surrounded by 269 antique, old, table and rose cut diamonds, approximately 5ct in total. Antique French petrol blue opaline glass box Georgian crowned diamond heart ring from turn of the century 18th/19th century.