The document lists the 10 most expensive necklaces in the world. It provides the name and ranking of each necklace, including the Bulgari Sapphire and Diamond Necklace ranked 10th, the Leviev Fancy Pink and White Diamond Necklace ranked 9th, and the Garrard: Heart of the Kingdom Ruby ranked as the most expensive necklace in the world. The list concludes by thanking the reader.