Shohista Turdiyeva on Instagram: "If you remember, I shared this necklace from my Cartier visit to the V&A—one tiara that really caught my attention! This Opal Tiara can be worn as a necklace, brooch, or tiara!! Commissioned in 1937 by Cartier London for Mary Alice Cavendish (later Duchess of Devonshire), it features rare Australian black opals gifted by her husband. Set in platinum and diamonds with an Art Deco design, these harlequin opals flash green, blue, and crimson—super rare for Cartier!