scheelite: a mineral used as an ore of tungsten
mineral: solid homogeneous inorganic substances occurring in nature having a definite chemical composition
magnoliidae: a group of families of trees and shrubs and herbs having well-developed perianths and apocarpous ovaries and generally regarded as the most primitive extant flowering plants; contains 36 families including Magnoliaceae and Ranunculaceae; sometimes classified as a superorder