14-Carat Orange Diamond May Fetch $20 Million

Weighing approximately 14.82 carats, this diamond, being called “The Orange,” is expected to fetch between $17 million and $20 million at the sale, being held at Four Seasons Hotel des Bergues.
Pure orange diamonds, also named ‘Fire diamonds’ by gemologist Edwin Streeter in his book The Great Diamonds of the World (1882), are exceptionally rare in nature. It is more common to find orange diamonds with secondary colors. The orange color is the result of the presence of nitrogen during the diamond’s creation. Among the very few fancy vivid orange diamonds that were ever sold at auction, the largest was less than 6 carats. “The Orange” is more than double that size.
The Gemological Institute of America, which graded the diamond and issued its report, recently said: “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.”