This ‘perfect’ diamond could fetch up to $25 million in NYC next month

[caption id="attachment_820447" align="aligncenter" width="600"] The Ultimate emerald-cut diamond held by a Sotheby’s employee.[/caption] An internally "flawless” 100-carat emerald-cut diamond was shown Monday in Dubai only weeks before the jewel goes under Sotheby's hammer in New York next month, where predictions...