Scheelite specimen photographed under two lighting conditions

Scheelite (CaWO₄) is a major tungsten ore. The before/after comparison shows a scheelite specimen photographed under two lighting conditions. In normal room light, the mineral appears orange against its pale matrix, highlighting its crystal form. When illuminated with shortwave ultraviolet light, the scheelite fluoresces a vivid blue, demonstrating its distinctive property as a self‑activated fluorescent mineral.