• Frédéric Messier Leroux

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. Shown respectively under shortwave, then midwave, and in visible light.

Specimens from the same locale have been posted in the Fluorescent Minerals facebook group; the other person who posted some of it photographed his specimens under 312 nm midwave UV; in my case, the midwave UV pictures were taken under 306 nm.

Interestingly, the scheelite responds quite differently under these two wavelengths; under 312 nm it is reddish-orange, and under 306 nm, it is pinkish white. My pictures are exactly like I see the specimen in person; the color rendition is correct. And the person from whom I acquired it showed me pictures taken under 312 nm; the scheelite indeed fluoresced reddish-orange. Since this person is a good photographer and an experienced collector, I have no doubts his pictures were accurrate as well. This is worth experimenting more! The calcite responds only to midwave; it glows a very weak red; 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; since the SW response is the typical blueish-white, I show it after the midwave response, which is more unusual; then finally, the specimen is shown in visible light in the last picture.

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