You can cut the diamond. Cutting it uses a tool sort of like a chisel, that actually breaks the diamond. When you cut a diamond, (if you do it right) it exposes a flat face, or facet as they are called when it's a gem. By cutting it several times, you can make it so that all you can see are the facets you created by cutting it, and it becomes the gem we are all familiar with from jewelry.
Note that this work is only done by professionals using professional, diamond-tipped tools.
Rough Diamond - album - was created in 1977.
Diamond in the Rough - album - was created in 1976-07.
A Real Diamond in the Rough was created on 2009-05-01.
Rough Cut Diamond was created on 2009-07-22.
Rough Diamond - 2006 is rated/received certificates of: Australia:PG
Yes.
A Rough Diamond - 1911 was released on: USA: 5 June 1911
A Rough Diamond - 1913 was released on: USA: 26 November 1913
A Diamond in the Rough - 1911 was released on: USA: 4 December 1911
A Diamond in the Rough - 1914 I was released on: USA: 26 April 1914
The Rough Diamond - 1921 was released on: USA: 30 October 1921
Diamond in the Rough - 1988 is rated/received certificates of: Netherlands:16