• Frédéric Messier Leroux

Scapolite, with a uranyl-activated coating - Papineau RCM, Outaouais, Quebec, Canada

Very brightly fluorescent scapolite, from a new locality visited in October & November 2020 with one of my collecting partners. Unfortunately, I can mention only the general area and not the exact locale, since the occurrence is located on private land, and the owners asked us to keep this locality secret. This is one of my favorite specimens from this locality, where we also found lots of fluorescent phlogopite and diopside.

I managed to bring back a few buckets of phlogopite and diopside from this spot, but found only about half a dozen pieces of scapolite; this is one of the two best ones. The second best piece has less uranyl-activated green on it.

In the first picture, the specimen is shown under LW + SW; then under LW, SW and visible light.

Size: 9,4 cm X 4,9 cm X 2,8 cm


Longwave UV response. The scapolite is very bright, but the uranyl-activated green barely reacts.

Shortwave UV response. Under SW, the fluorescence of the scapolite is unusually weak, compared to yellow-fluorescing scapolite from other localities in the Grenville geological province in Quebec and Ontario, for example "wernerite" from Grenville-Sur-La-Rouge.

11 views0 comments

Email comments or suggestions:


Nature’s Rainbows is a non-commercial web site maintained entirely by volunteer hobbyists and contributors.  Our mission is to provide information about UV and luminescence, premium fluorescent mineral photos, and a fluorescent mineral database for the enjoyment of FL mineral collectors around the world.  Information on this web site is covered under a Creative Commons License.

Feel free to contact us with comments and suggestions.

Like us on Facebook!

  • reddit
  • Facebook Social Icon

Subscribe to our RSS (Real Simple Syndication) feed to get new posts delivered directly to your desktop!