A diamond ruined his life

A man finds a very expensive pink diamond, and this changes his life. He thought it would be his last day in that gold and diamond mine, as he wanted to act like the genius with a higher IQ than everyone else by hiding the diamond.

The Title: Blood Diamond (2006)

Cast:

Leonardo DiCaprio as Danny Archer
Jennifer Connelly as Maddy Bowen
Djimon Hounsou as Solomon Vandy
Kagiso Kuypers as Dia Vandy
Arnold Vosloo as Colonel Coetzee
David Harewood as Captain Poison
Antony Coleman as Cordell Brown
Benu Mabhena as Jassie Vandy
Anointing Lukola as N'Yanda Vandy
Basil Wallace as Benjamin Kapanay
Jimi Mistry as Nabil
Michael Sheen as Rupert Simmons
Marius Weyers as Rudolf van de Kaap
Stephen Collins as Ambassador Walker
Ntare Mwine as M'Ed
Ato Essandoh as Commander Rambo
Tony Kgoroge as Liberian Border Guard
Nick Reding as DFID Minister
Adetokumboh M'Cormack as RUF Trainer
Winston Ntshona as Old Mende
Gaurav Chopra, David S. Lee, and Jonathan Pienaar as journalists