The Necklace was created by Mouawad that is headquartered in Geneva, Switzerland. The Incomparable costs about $55 million to be the most valuable and expensive necklace in the world. But the question here is why is this necklace very expensive? The answer is that it features one-of-a-kind deep yellow diamond as a pendant. According to the Gemological Institute of America, it was regarded as the world’s largest internally flawless colored diamond. The flawless diamond was discovered about 30 years ago in the Congo by a young girl. - See more at: http://www.topteny.com/top-10-most-expensive-diamond-rings-necklaces-in-the-world-2015/#sthash.IykWQOn3.dpuf