fluorescent SODALITE with Aegirine - Mont Saint-Hilaire, Quebec, Canada
Orange LW fluorescent Sodalite with dark Aegirine (Acmite). The SW response is in moderate shades of red.
at this locality, in 2017 , "collecting is restricted to one or two field trips per year, to small groups (drawn by lottery) of members of the Club de Minéralogie de Montréal, under very strict rules" (mindat.org)
Measures approximately 5 x 3 x 1.5 inch, 1 lb 3.15 oz / 127 x 76 x 38 mm, 543g
Item # A5431014
To show the fluorescent response the specimen was illuminated using 6 watt 254nm (Short Wave) / 366nm (Long Wave) UVGL-58 lamp (you need a proper UV light source to observe the fluorescence, more powerful lamp = brighter response).