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Yes. Ultraviolet light can be used to identify willemite. In fact willemite continues to glow even after the ultraviolet light is turned off.
Willemite is usually formed as an alteration of previously existing Sphalerite ore bodies and is often associated with Limestone.
willemite
Smithsonite (ZnCO3) , Sphalerite (ZnS), Willemite (Zn2SiO4), Zincite (ZnO)