Feeling his bank's personal safe is insufficient to protect such a rare and valuable piece of jewellery, he takes it home and keeps it in his dressing room.

Eventually, Holmes concludes Burnwell is a notorious criminal who conspired with Mary, unaware of his real identity, to steal the coronet.

He later buys back the missing beryls from a fence that Burnwell sold them to, receives compensation from Holder, and tells him to apologize to Arthur for assuming he was the thief.

A 2001 episode of the animated television series Sherlock Holmes in the 22nd Century, titled "The Adventure of the Beryl Board", was based on the story.

[12] A dramatisation of "The Beryl Coronet" was broadcast on the BBC Light Programme on 30 June 1959, as part of the 1952–1969 radio series starring Carleton Hobbs as Holmes and Norman Shelley as Watson.

[14] "The Adventure of the Beryl Coronet" was dramatised as a 1977 episode of the series CBS Radio Mystery Theater with Kevin McCarthy as Sherlock Holmes and Court Benson as Dr.

It featured Anthony Newlands as Holder, Angus Wright as Arthur, Petra Markham as Mary, and Timothy Carlton (father of Benedict Cumberbatch, another famous Sherlock) as Sir George Burnwell.