White Gold, Light Brown-Pink Diamond and Diamond Ring  Photo courtesy Doyle New York.

18 kt., centering one rectangular cut-cornered modified brilliant-cut Light Brown-Pink diamond approximately 2.45 cts., surrounded by 8 heart-shaped and round diamonds approximately 2.60 cts., edged and accented by small round diamonds approximately 1.04 cts. Size 6 1/4. Estimate $60,000-80,000 

With GIA report no. 6127665473 stating that the diamond is Light Brown-Pink color. 

Doyle New York. Important Jewelry. Wednesday, September 25, 2013 at 10am - http://www.doylenewyork.com