We’ve just noticed the gigantic diamond ring Uma Turman wore on Monday in New York as she unveiled the new BMW i8. Uma has been spotted wearing this dazzling ring on her right hand, and not on her left engagement ring finger. Maybe this is the first tell tale sign she is engaged to London-based financier Arpad Busson or it was simply a gift to herself. Thurman has had an on/off relationship with Arpad Busson since 2008. Just a year after they began dating the couple announced their engagement with an 8ct diamond engagement ring surrounded with 20 smaller diamonds. Unfortunately it was not meant to be at the time and they broke the engagement off in 2009. They have since got back together; Thurman also gave birth to their first daughter, Rosalind Arusha in July. Thurmas ring is set with an enormous pear-shaped diamond, beautifully held in a platinum claw setting. It also looks like the shoulders of the band are set with small round brilliant cut diamonds adding more dazzle to the ring.