Circular, about 1/2” diameter.  White metal, probably a tin-lead pewter alloy.  Domed section, each side with a cross with central lug or nub. The top with a large suspension ring intact, for suspension, intact.  Fine rich glossy patina with the detail well preserved. These were produced in the Holy Land for pilgrims who wore them at home as prestige symbols. They were sold at shrines of saints where holy relics of the saints, sometimes, the whole corpus were preserved. The symbols are specific to the life and achievements of the saint. Pilgrims wore them strung as necklaces, on hats, or attached to the clothing.