SC460 - Willemite
Locality: Hull Mine, Hull Mine group (Rialto Mine group; Hull group of claims; Rialto claims), Buckeye vein group, Castle Dome Mine group, Castle Dome Mining District, Castle Dome Mountains, Yuma County, Arizona, USA (MINDAT)
Size: 3 x 3 x 2 cm - Thumbnail (<1 inch)
Weight: 21.9 g
minID: TDR-R90
Brown willemite crystals. Most of them seem to be covered by a second generation of druzy willemite. This second generation willemite shows a very strong green fluorescence under shortwave UV light, with very long lasting green phosphorescence/afterglow. The first generation brown willemite crystals seem to be not fluorescent. There is also a little fluorite on the side, blue fluorescent under UV light.
