Wickenburgite, Fluorite, Willemite, etc - Potter-Cramer Mine, Arizona
Contributed by: FMS Admin
minID: DQ5-JLR
Date: Feb 22nd, 2026
Locality: Potter-Cramer Mine, Vulture Mining District, Maricopa County, Arizona, USA (See on Mindat)
Size: 46 x 40 x 58 mm
Description:
A rich SW assemblage from Potter-Cramer. Wickenburgite fluoresces shades of pink and red, fluorite in violet blue, willemite in pale green, cerussite in yellow, and an unknown mineral in light blue. Some of the red is possibly calcite. In LW the fluorite and cerussite react the same color, the lighter blue mineral goes to a pale bluish-white, and the wickenburgite and willemite do not react. Pictured on both sides in SW, LW and white light.
Originally posted by Dennis Michael on Nature's Rainbows.
Summary of luminescence responses:
Wickenburgite (Mindat) (RRUFF)
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red
- Fluorescence under Longwave (365nm LED) UV light: Blue
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Blue
- Fluorescence under Longwave (365nm LED) UV light: Yellow
- Fluorescence under Shortwave (255nm LED) UV light: Green