Ring bought at garage sale worth $456K

Posted at 3:52 PM, May 22, 2017
and last updated 2017-05-22 12:30:30-04

(SOTHEBY'S/CNN) - A ring bought for about $13 at a garage sale in London in the 1980s has been valued at over $400,000.

The buyer assumed the ring was a piece of costume jewelry and only decided in the last few months to have it appraised.

Much to the owner's surprise, the ring turned out to be a genuine, cushion-shaped diamond weighing 26.27 carats.

The ring is scheduled to be sold at Sotheby's on June 7.

Copyright 2017 Sotheby's via CNN. All rights reserved.