Earlier this year or was that last year?
SBS had a documentary featuring the royal jewels, ie European Royalty & British
quite interesting, how many of the jewels were either passed on, or sold/auctioned (the crown which Queen Elizabeth II wore when Obama came to visit was bought for $22,000 pounds back in the 70s? something like that, cant remember who she bought it off now) smuggled out of Russia etc
Also the documentary showed how many of the pieces were redesigned and/or had were designed/redesigned so they could swap different jewels, ie pearls instead of gems or gems instead of pearls or pieces could be taken out of crowns made into brouches, shorter lenght earrings or longer dropline earrings etc etc
I went to double check if this was the piece which was made for Napoleans first wife Josephine, yes
http://marilynsroyalblog.blogspot.com.au/2010/05/royal-focus-swedish-cameo-tiara.html
The SBS documentary has the Queen of Denmark telling the story of the Royal Jewels throughout history, our very own Princess Mary also was featured and her own set (she wears for offical engagments) story is quite interesting, and how Mary had her own set redesigned slightly to suit her own facial features and head lol
Queen of Denmark is a huge fan of redesigning pieces for multi purposes