Calcite, willemite and fluorite , from the Hull mine, Arizona

Nice cabinet-sized specimen of calcite (red fluorescence), willemite (green fluorescence) and fluorite (blue fluorescence), from the Hull Mine, Castle Dome Mining District, Yuma County, Arizona. In the first image of the slideshow below, the specimen is shown fluorescing under shortwave UV + midwave UV combined (the calcite fluoresces brighter with midwave UV); in the next images, the specimen is shown, respectively, under shortwave UV,

longwave UV and in visible light, then the back side is shown in the same order.

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