Scheelite under shortwave ultraviolet light
Detailed Description
Scheelite (CaWO₄) specimen fluorescing bright blue under shortwave ultraviolet illumination. Scheelite’s intense blue response is caused by intrinsic activation within the mineral lattice, distinguishing it from most fluorescent minerals whose glow results from trace impurities. This mineral naturally occurs and serves as a main source of tungsten.
Sources/Usage
Public Domain.