The impossibly expensive L’Incomparable Diamond Necklace was unveiled by the internationally acclaimed Mouawad jewelry company and still has the honor of being the most valuable piece of its kind in the world. In an incredible stroke of luck, this jaw-dropping gem was discovered by chance by a young girl in the Congo three decades ago in a pile of kimberlite (a by-product of diamond mining). Its centerpiece is the world’s largest internally flawless diamond (which is a massive 407.48 carats!), but the necklace also features no fewer than 102 smaller stones. The necklace is valued at an estimated 55 Million.