Name of this movie?

Question

I saw this movie on a plane trip to India, so I don't know if it's American, or British or anything else (I don't remember where the connecting flight was). It was in English though...

This guy was a diamond theif and he wanted to steal the biggest uncut diamond in the world. To do this, he was going to disguise himself as a diamond cutter, but in this alternate old man personality he meets this young attractive girl. In the end I think he doesn't steal the diamond. The movie was mostly about his two sides as the young diamond theif and the old diamond cutter.

Does anyone remember this movie or can they give me more details to do a google search with (I've tried before and can't find anything)? Thanks!

Answer 1

try a keyword search on imdb.com
start with something simple, like 'diamond thief' and narrow it down from there.

Answer 2

Black Diamond, maybe??