Walter Adler Chefitz wowed the judges with a triple twisted Möbius studded with 225 Swarovski Passion Topaz gemstonesFor Walter Adler Chefitz, the road to winning JCK Rock Star—the magazine’s first original video series, a 12-­episode competition pitting five designers against each other in a bid to create the most beautiful piece of Swarovski gemstone jewelry—was marked by countless sleepless nights, numerous failed executions, and a ­last-minute scramble to Mexico City, all of which took their toll on the New York City–based designer.“The piece was impossible,” he says, reflecting on the silver bracelet encrusted with 225 Swarovski genuine Passion Topaz gemstones that nevertheless impressed the judges.Chefitz, a former David Yurman design director, signed on to the competition last spring in part to give his 1-year-old jewelry company, Walt Adler Jewelry, a nudge and in