How a 24-year-old CEO is leading the charge at Michigan’s Birmingham JewelryWhile in college, Marina Pilibosian, CEO of Birmingham Jewelry, thought she was following her passion by majoring in health services administration. But a couple of years into her studies, she realized her real bliss resided at home—at her parents’ independent fine jewelry store in Sterling Heights, Mich. “I always liked science, but I ended up hating [it],” recalls the 24-year-old, who hung out in a playpen at the store when she was a baby. “I didn’t want to come to the store, and years later say, ‘I wish I had been a doctor.’ I had to be sure.” By the time she was 7 or 8, she could pick out earrings or a bracelet to match pieces customers came in wearing, reports her mother, Reba, who oversees Birmingham’s operations. Marina’s father, Gregory, founded the shop in 1975 after ­apprenticin