Scheelite, with calcite and fluorite, from Hunan, China

Nice little specimen from the Chashan Mine, Xianghualing Sn-polymetallic ore field, Linwu Co., Chenzhou, Hunan, China.


Interestingly, the scheelite responds quite differently under two UVB (midwave UV) wavelengths; under 311 nm it is reddish-orange, and under 306 nm, it is pinkish white. The calcite responds only to midwave; it glows a very weak reddish violet; and the fluorite glows a very weak blue, noticeable mostly under longwave (not shown here - not much to see under LW except the weak response of the fluorite).


In the first picture, the specimen is shown under 306 nm MW, then 311 nm MW, then SW UV, and finally, the specimen is shown in visible light in the last picture.



Midwave UV (306 nm)



Midwave UV (311 nm)



Shortwave UV


Visible light.



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