Vlasovite with Agrellite and Uranyl-Activated Unknown - Kipawa Complex, Témiscamingue, Quebec, Canada
Contributed by: FMS Admin
minID: 6C8-A9A
Date: May 17th, 2026
Locality: Kipawa alkaline complex, Les Lacs-du-Témiscamingue, Témiscamingue RCM, Abitibi-Témiscamingue, Québec, Canada (See on Mindat)
Size: 6.5 x 3 x 8.3 cm
Description:
Shown here is a nice specimen of vlasovite, a rare fluorescent mineral found only in a few localities around the world, along with agrellite and non-fluorescent eudialyte (two other rarities), plus some unknown uranyl-activated green fluorescing mineral. While not being the specimen with the best coverage I have seen, it is still quite aesthetic example from this locality. While the agrellite and vlasovite are quite boring under white light, the gemmy red eudialyte is really beautiful.
The specimen overall is at its best under SW; but the MW response is also quite good. Under MW, both the vlasovite and the uranyl-activated green are weaker than under SW, but the agrellite is at its best. The LW response isn't impressive; but since pictures of the LW fluorescence of agrellite and vlasovite (both a weak orange under LW) are rarely posted online, I thought it's a good idea to include it here.
Originally posted by Frédéric Messier Leroux on Nature's Rainbows in 2021.
Summary of luminescence responses:
Agrellite (Mindat) (RRUFF)
- Fluorescence under Longwave (365nm LED) UV light: Orange
- Fluorescence under Midwave (305nm LED) UV light: Pink
- Fluorescence under Shortwave (255nm LED) UV light: Pink
- Fluorescence under Longwave (365nm LED) UV light: Orange
- Fluorescence under Midwave (305nm LED) UV light: Yellow
- Fluorescence under Shortwave (255nm LED) UV light: Yellow