Scheelite (CaWO4) is the quintessential fluorescent mineral, renowned for its brilliant sky-blue to bluish-white glow under shortwave UV light. In daylight it ranges from colorless and icy to warm honey-oranges and butterscotch browns; a few locales produce attractive pale blue tones in natural light. Crystals are typically sharp tetragonal dipyramids that look like octahedra, often perched on contrasting matrices such as muscovite, quartz, fluorite, or ferberite. The best specimens combine textbook form, pleasing color, and strong fluorescenceâqualities that make scheelite a staple for both aesthetic and scientific collections. It is notably dense for its size, with a bright vitreous to adamantine luster when fresh.
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