[s4e3] Fairytale -

: Diana chooses the blue sapphire ring, which was actually a stock item for sale from the jeweler Garrard's rather than a unique royal heirloom.

: The episode uses the ring selection to contrast the "fairytale" public image of her engagement with her growing isolation and lack of preparation for the rigid protocols of the royal family. [S4E3] Fairytale

During the scene, Diana is offered several royal heirlooms and new pieces for sale. While the jeweler begins to describe a Burmese ruby ring as a "legendary" piece, Diana interrupts him to choose a set in 18-karat white gold and surrounded by 14 diamonds. : Diana chooses the blue sapphire ring, which

Key details about this "proper piece" in the episode include: While the jeweler begins to describe a Burmese

: For the show, a high-quality reproduction of this ring was created, which was later sold at a specialized The Crown Auction . "Fairytale" EXPLAINED - The Crown S4E3 Recap