Scapolite var. Wernerite - Grenville, Quebec, Canada
Contributed by: FMS Admin
Date: May 14th, 2026
Locality: Grenville-sur-la-Rouge, Argenteuil RCM, Laurentides, Québec, Canada (See on Mindat)
Size: 8.8 x 5.4 x 10.5 cm
Description:
Shown here is a nice cabinet-sized specimen of dark green scapolite var. wernerite, from Grenville-Sur-La-Rouge, Quebec, Canada. It is very coarse-grained, pegmatitic so to speak; and it has nice green gemmy areas in daylight. Like noticed by a member of the Facebook Fluorescent Mineral group when I posted this specimen a few days ago, just like the "emerald green" variety of sodalite from Greenland, the more gemmy area fluoresces less brightly than the more opaque areas. I have no idea why; my assumption is that despite their gemminess, the transluscent areas are less pure, and contain finely disseminated non-fluorescent inclusions.
As is always the case with Grenville wernerite, the brightest response is seen under longwave UV; midwave UV and shortwave UV also produce a decent fluorescence but alas, unlike the best specimens from the area, there is no blueish-white SW fluorescing diopside in it.
Originally posted by Frédéric Messier Leroux on Nature's Rainbows in 2021.
Summary of luminescence responses:
Scapolite var. Wernerite (Mindat) (RRUFF)
- Fluorescence under Longwave (365nm LED) UV light: Yellow