2) Peacock Brooch by Graff ($100 million)

Graff is a name to reckon with in the world of diamonds. This London-based company has created the Peacock brooch, which is worth more than a private jet. This piece has 1,305 gemstones, weighing in at 120.81 carats. This piece has a deep blue diamond at its heart. If you wear Peacock brooch, you would be having the GDP of a small nation on you.