SCULPTURE CLASS: While steadily building her fine jewelry business, designer Ippolita Rostagno has also been pursuing another passion: fine art. On Wednesday evening at Highline Studios, she showed her latest work, “Reliquary,” a term used to describe a container for relics related to saints and other religious figures. The project, which incorporates glass blowing, steel sculpture and video art, has been four years in the making and is devoted to “how we enshrine our beliefs,” she said. “Religion with all its rituals and aesthetic trappings is the ultimate enchantress.” The main pieces reflect themes of desire, war and shelter. One, for instance, is comprised of a giant steel torso with an oversize glass heart. Its counterpart is a sculpture of the body’s hip and thigh section, with a prominent blown glass appendage serving as the male anatomy; a video inside of two intertwined hands is meant to express “the wish for diplomacy over violence,” said Rostagno. Beginning last Friday, the works are on display at the New York Academy for the Arts to help promote the school’s sculpture program.