"This Giant Topaz is coming out of hiding" PBS NewsHour 10/17/2016

Excerpt

SUMMARY:  In our NewsHour Shares moment of the day, feast your eyes on the Ostro Stone, 9,381 carats of glittering topaz.  The largest known stone of its kind, the Ostro will be on view to the public for the first time ever, at London’s Natural History Museum.  Discovered in 1986 in the Amazon rainforest, the stone has been stowed away for three decades, until now.