The pear-cut diamond of 39 carats, D color, VVS1 clarity and you see in the photo is the "Evening Star". A luxury of nature that was found in the old mines Golconda, India. Christie's is responsible for organizing its upcoming auction on 10 December.
As ultimate luxury gift for Christmas, few gems can equal value and quality. Its name is due to its former owner who used to wear at parties and gala evening. If it were me, would look so proud.
Nothing that you can still do crazy. His starting price is between 2.4 and 3.7 million euros (at current exchange rates). The auction will be held at Rockefeller Plaza in New York but if you want to bid, you can do it online.