Over the centuries, Cartier has crafted a vast catalog of exquisite jewelry, timepieces, and precious objects. The world's greatest collectors--kings and queens, emperors and empresses, maharajas, artists, eminent industrialists, and anonymous connoisseurs alike--have passionately assembled collections of these unique pieces, perpetuating the spirit of collecting Cartier. As did the House which, following extensive research that began in the early 1980s, brought together historic and legendary jewels into the world's most important Cartier collection--a veritable treasure and testament to the creative genius of Cartier. This reference work examines the significance of collecting Cartier in past centuries and the present day, detailing how to evaluate the criteria and styles by which a Cartier collection is assembled. It provides markers to determine the value of both historic and instantly collectible contemporary pieces, as well as precious gemstones. Insight is also given into the specificities of the art market, stylistic vocabulary, and criteria of authenticity, while showcasing the splendor of these Cartier creations.