A cousin of Qatar's ruler lost his fight at London's High Court on Thursday against another branch of the Gulf nation's royal family over a 17th century diamond worth millions.

From a Persian prince to the American “jeweler to the stars,” the world’s largest cut blue diamond has a lengthy history.

Tribune News NetworkDohaQatar’s Fahad Jassim HK Al Thani dazzled on the opening day of the prestigious HH The Amir Sword International Equestrian Festival 2025 at Al Shaqab on Thursday as the ...