LONDON (Reuters) - British police were hunting for an unidentified man on Tuesday after a suitcase containing 1 million pounds ($1.3 million) worth of gems was stolen from a luggage rack on a train at London s Euston station. The owner, a 35-year-old jewelry dealer, boarded a train to Birmingham on Nov. 8 but when the train arrived at Rugby in central England, he discovered that his suitcase of rubies, emeralds and sapphires was no longer on the luggage rack. Police released a grainy image of a man who they said they would like to speak to.  I would like to speak to the man in the CCTV images about this extremely high value luggage theft,  Det. Sgt. Nick Thompson from British Transport Police said.  The suitcase was a large black suitcase and contained more than 40 gems such as rubies, emeralds and sapphires.  