Mad InspirationsNew York City–based MadStone launched this year with several fine jewelry collections new for Spring 2011. All are inspired by “the nether­world,” according to designer and former fashion publicist Kerri Halpern. One look at three of her current lines—MadSkulls, MadAnimals, and Random—makes clear that Halpern favors a dark aesthetic. For buyers seeking something lighter than the black diamond–encrusted skulls and jeweled spiders in Halpern’s ouevre, there’s always the champagne-inspired Bubble Collection. In silver, suggested retail prices start at $500.American Estate Sale Artist Michael Galmer once contributed silver tabletop designs to Tiffany & Co., and crafted his own pieces at Galmer Silversmiths, his Long Island City, N.Y., studio. Soon, however, Galmer’s silver repoussé jewelry promises to take center stage, thanks to its modern-da