Christie's has announced it will auction the world's largest fancy vivid orange diamond on November 12, 2013. The 14.82 carat diamond is known as The Orange. It is expected to fetch between $17 and $20 million. It will lead Christie's jewelry auction in Geneva.
The GIA Gemological Institute of America recently said of The Orange, "In the Laboratory's experience, strongly colored diamonds in the orange hue range rarely exceed three or four carats in size when polished. (This diamond) is almost four times larger than that size range. In GIA's colored diamond grading system, as the color appearance of strongly colored diamonds transitions from orangy yellow to orange the occurrence becomes progressively more rare - that is - the less yellow present the more rarely they occur."
It is an amazing looking diamond. Take a look: