Scheelite is a calcium tungstate mineral (CaWO4).  It has a nonmetallic luster, is variably colored, moderately hard (H = 4.5 to 5), has one cleavage plane, is fairly heavy for its size, and fluoresces an intense blue under ultraviolet light.  Scheelite occurs in igneous & metamorphic rocks, and is a ore mineral for tungsten (W).



Scheelite in matrix (field of view 3.4 cm across) from Timmins, Ontario, Canada.

Left: scheelite (light brown) under white light.

Right: scheelite under ultraviolet light; scheelite usually fluoresces a bright blue under UV.



Photo gallery of scheelite



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