In the chaos and wake of the Russian Revolution, the jewels of nobility and royalty went missing. But not all were lost. Hermitage-Amsterdam presents 300 jewels from over two centuries, including pieces owned by empresses and ordered from Cartier, Tiffany, and Fabergé. This extravaganza of dazzle takes context from more than 100 paintings, gowns, ensembles, and accessories, as well as a series of charming tableaux, and delineates Russia’s changing taste in jewelry design. —L.J.