Longwave Violet Fluorite - Rogers Mine, Madoc, Ontario, Canada
Contributed by: FMS Admin
minID: 5XJ-FHF
Date: May 15th, 2026
Locality: Rogers Mine, Rogers mine property, Centre Hastings Municipality, Hastings County, Ontario, Canada (See on Mindat)
Size: 5.3 x 2.4 x 6.4 cm
Description:
Fluorite specimens from this locale are quite popular, especially in Canada, among collectors of "white light minerals", but rarely heard-of as fluorescent minerals. Other specimens I have seen either barely reacted to UV or were simply non-fluorescent; however, this one is an exception. While not fluorescing very brightly, it is still a nice candidate for a LW display, if placed closer to the lamp, because of its pretty uncommon violet longwave response, and subtle zoning in its UV response.
As is often the case, the fluorite on this miniature specimen is associated with white baryte, which, alas, is non-fluorescent.
Originally posted by Frédéric Messier Leroux on Nature's Rainbows in 2021.
Summary of luminescence responses:
Fluorite (Mindat) (RRUFF)
- Fluorescence under Longwave (365nm LED) UV light: Violet