What is the most expensive diamond watch?

The most expensive diamond watch will vary over time as luxury watchmakers debut new models. Graff stands out for offering some of the priciest watches set with diamonds, such as the $55 million Hallucination and the $40 million Fascination. Other aspirationally priced diamond watches include the Chopard 201-Carat Watch at $25 million, the Jacob & Co. Billionaire Watch at $18 million, the Hublot $5 Million Watch at $5 million, the Piaget Emperador Temple at $3.5 million and the Cartier Secret Phoenix Watch at $2.7 million. Shop a large selection of diamond watches on 1stDibs.