Colombian Emerald & Diamond Necklace. Photo courtesy M. S. Rau Antiques.

A monumental 35.41-carat Colombian Emerald displays its highly desirable and brilliant green hue in this necklace. The lush color of this important jewel is enhanced by approximately 30.00 carats of shimmering white diamonds. Crafted of platinum. 17" length. Price: $500,000

M. S. Rau Antiques. http://www.rauantiques.com/