Opposite business styles attract sophisticated shoppers at Polacheck’s JewelersBrent Polacheck was 22 when he dropped the proverbial bomb on his father, Stephen: He wanted to quit college to work at the family store, Polacheck’s Jewelers. “He told me I needed to graduate, go to GIA, and work for someone else for two years before he would even consider it,” recalls Brent, now 40 and co-owner of the Calabasas, Calif., fine jewelry store with his semi-retired dad. “It was the greatest advice anyone has ever given me.” Brent went on to graduate, hone his retail chops at Tourneau in New York City, and earn his GIA certification. “I started at the bottom,” he says. “If I hadn’t, I probably wouldn’t be where I am today.” Polacheck’s is located in one of Hollywood’s toniest bedroom communities, and its father-son owners have made the shop a major destination for big d