Gilty Pleasures

Visitors to Manhattan this winter should forget about having breakfast at Tiffany’s. The really big rocks, including the 128-carat Tiffany Diamond, are across the park at The American Museum of Natural History’s “The Nature of Diamonds” exhibition. The show, which runs Nov. 1 to April 26, includes dazzling jewels (like Peter the Great of Russia’s crown, left), a specially constructed underground diamond mine and hands-on scientific and technological exhibits. For information, call (212) 769-5100.