Shimen Mine, Shimen County, Changde Prefecture, Hunan, China
Ca4Mg(AsO4)2(HAsO4)2·11H2O
A note about the colors in these photos: This was a difficult specimen to get the color right. I did not want it to look better than it really is. Actually, in reviewing the pictures, the specimen is probably a little redder in real life. The color in the LW photo is a little off also, it should be a more chromatic red. Also, the whitish material which under LW glows blue and green does not glow nearly as bright.