Willemite is a mineral that can indeed be identified using ultraviolet light. When exposed to ultraviolet light, willemite exhibits a distinct fluorescence, emitting a bright yellow-green to yellow glow. This fluorescence is due to the presence of manganese impurities within the mineral's crystal structure. The intensity of the fluorescence may vary depending on the concentration of manganese present. Willemite's fluorescence under ultraviolet light is a valuable characteristic that aids in its identification and differentiation from other similar-looking minerals.