At 24 years old, Brady Legler, a student at New York’s Parsons the New School for Design, is already making a name for himself with his bright abstract paintings, which are selling for thousands of dollars—and now he has launched a collection of equally striking fine jewelry. Legler cites his Italian grandmother’s elegant style as the inspiration for his new range of sleek contemporary jewels. A fashion model from the 1940s to the 1960s, she was “definitely ahead of her time,” says Legler, with a “simple, stre…