Fire officials were waiting last week to hear from the state Fire Marshal’s Office on the cause of a three-alarm fire that destroyed an antique store on Jerusalem Road. “There was nothing suspicious about it,” Fire Chief Robert Silvia said of the Feb. 12 fire at the Reflections Antique Emporium, a longtime establishment in West Corner where Cohasset, Hull, and Hingham meet. The store manager discovered the fire, which began in the walls of the antiques-stuffed, century-old wood frame building and burned off the roof, Silvia said. “It got fairly dramatic from the outside,” he said in an interview. The store’s owner was selling the building and had planned to pass papers soon, he added.