ad·u·lar·ia /ˌæʤəˈlæriə, ˌædjə, ˈlɛr-/ 冰長石
Ad·u·la·ri·a n. Min. A transparent or translucent variety of common feldspar, or orthoclase, which often shows pearly opalescent reflections; -- called by lapidaries moonstone. ◄ ►