- Country: UK
- Genres: Drama, Family, Mystery
- Release: 1951-07-29
- Director: Alan Bromly
- Writers: Arthur Conan Doyle (1859–1930) , Anthony Cope
- Language: English
- Stars: Andrew Osborn , Philip King , Jeremy Spenser , Martin Boddey , Felix Felton , Frank Carriello
- Runtime: 30 min
- Awards: N/A
- AKA: The Adventure of the Mazarin Stone , The Adventure of the Mazarin Stone (United Kingdom)
- Plot: The Mazarin Stone, a yellow diamond which is part of the British Crown jewels, has been stolen. Sherlock Holmes is hired by the British government to retrieve it.
- IMDB:tt1661079
The Adventure of the Mazarin Stone Cast
Andrew Osborn
Sherlock Holmes
Philip King
Dr. Watson
Jeremy Spenser
Billy
Martin Boddey
Sam Merton
Felix Felton
Lord Cantlemere
Frank Carriello
Count Negretto Sylvius