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

11. Princess Katharina Henckel Von Donnersmark’s Tiara

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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.