A model holds the "Sunrise Ruby", a Burmese ruby weighing 25.59 carats, during an auction preview at Sotheby's auction house in Geneva, Switzerland, May 6, 2015. The ruby is expected to sell between ... more 
A model holds the "Sunrise Ruby", a Burmese ruby weighing 25.59 carats, during an auction preview at Sotheby's auction house in Geneva, Switzerland, May 6, 2015. The ruby is expected to sell between US $ 12,000,000 to 18,000,000 when it is auctioned on May 12 in Geneva. REUTERS/Denis Balibouse less 
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Reuters | Photo By DENIS BALIBOUSE / REUTERS
Wed, May 6, 2015 5:55 AM EDT