Sancy Astor family possessed it for 72 years until the 4th Viscount Astor sold it to the Louvre for $1 million in 1978. The Sancy now rests in the Apollo Gallery, sharing attention with the likes of the Regent and the Hortensia. Sancy The Sancy, a pale yellow diamond of , was once reputed to have belonged to the Mughals of antiquity, but is more likely of Indian origin owing to its cut, which is unusual by Western standards. The shield-shaped stone comprises two back-to-back crowns (the typical upper half of a stone) but lacks any semblance to a pavilion (the
Sequential auction Sequential auction A sequential auction is an auction in which several items are sold, one after the other, to the same group of potential buyers. In a "sequential first-price auction" (SAFP), each individual item is sold using a first price auction, while in a "sequential second-price auction" (SASP), each individual item is sold using a second price auction. A sequential auction differs from a combinatorial auction, in which many items are auctioned simultaneously and the agents can bid on bundles of items. A sequential auction is much simpler to implement and more common in practice. However, the bidders in each