12 Rare Gems So Rare And Expensive It Will Blow Your Mind

11. Princess Katharina Henckel Von Donnersmark’s Tiara


This beautiful piece of work not only gets its value from the many diamonds and emeralds used to create it, it always has a stunning history to add to it’s worth. Given to Princess Katharina from her husband Guido Henckel Von Donnersmarck, a German nobleman and one of the richest men of his time, the tiara was made of 11 pearl-shaped Columbian emeralds that were exceptionally rare. Together the emeralds weigh over 500 karats! It is estimated that the tiara is about $12.7 million.