The Big Jewel Case - 1930 was released on:
USA: 23 February 1930
The Emergency Case - 1930 was released on: USA: September 1930
The Great Marshall Jewel Case - 1910 was released on: USA: 1910
The Costello Case - 1930 was released on: USA: 15 October 1930
The cast of The Big Jewel Case - 1930 includes: Anita Garvin Robert Graves Fred Kelsey Eddie Lambert
The Benson Murder Case - 1930 was released on: USA: 12 April 1930 (premiere) USA: 13 April 1930 Austria: 1931
Special Agent 7 - 1958 The Prussian Jewel Case 1-8 was released on: USA: 1959
The Laurel-Hardy Murder Case - 1930 was released on: USA: 6 September 1930 Denmark: 31 August 1931
The Case of Sergeant Grischa - 1930 was released on: USA: 23 February 1930 Portugal: 27 March 1931 Argentina: 2 May 1931 Finland: 21 September 1931
Trent's Last Case - 1929 was released on: USA: 31 March 1929 Estonia: 15 May 1930
The Canary Murder Case - 1929 was released on: Germany: 1929 USA: 16 February 1929 (premiere) Finland: 4 November 1929 Austria: 1930 Portugal: 23 June 1930
It is just a clever name for a CD case. They are the slimmer version of the standard CD case. "Jewel" refers to the piece that clips into the center hole of the CD to keep it in place. It has a jewel-like design.
A jewel case for a DVD.