Leviev's Brilliant "Chameleon" Diamond Ring
"When heated or stored in a dark place, the gem can undergo a transformation. The jewels change to a more brilliant color featuring brighter greens, yellows, and even oranges.
The transformation, while beautiful and totally unique, is fleeting and a phenomenon not well understood by experts in the field. While chameleon diamonds were first recorded over half a century ago, we still know very little about the fascinating gems, which makes them that much more desirable...."
http://www.justluxe.com/lifestyle/jewel ... 244471.php
While you're there, if you want to see some GORGEOUS diamonds play the video.