Scheelite Distinguishing Characteristics

Scheelite Distinguishing Characteristics:

The fluorescence may be confusing especially when it becomes whitish or yellow from molybdenum substitution, but the high gravity differentiates it from fluorescent fluorite, and the crystals are so common that they will often be seen.

Specimens from worldwide localities show little difference in their color of fluorescence. Unlike other minerals, Scheelite is a "self-activated" mineral. Its fluorescence is due to the mineral itself, rather than some chance chemical impurity. The characteristic blue to bluish white fluorescence of this species is a valuable property in prospecting for Scheelite deposits at night. Old mines have even been reopened when mine shafts were examined with ultraviolet lamps.

Scheelite crystals can be mistaken as octahedron crystals. So fluorite with it's perfect octahedral cleavage and fluorescence. Can be mistaken for the brownish orange Scheelite. Massive Scheelite has often been mistaken for massive quartz, but then the fluorescence of Scheelite is a dead giveaway. 

 

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