Polylithionite Rose from Mt. St. Hilaire
Contributed by: Michael Crawford
Date: Mar 1st, 2026
Locality: Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada (See on Mindat)
Size: 48 x 40 x 62 mm
Weight: 38 g
Description:
Polylithionite rose over a small microcline matrix. Fluorescence is the typical yellow in SW and in this sample it’s quite pale. The photos are with 60W lamp. On the "rose petals" are several cubic micro-crystals of an unidentified mineral that fluoresces pale blue. Some (but not all) blue on the "petals edge" are reflections. Sorry but I cannot avoid them. Pale blue dots into the rose middle are true fluorescence of an unknown mineral.... see macro below (last picture).
Originally posted by Stefano Buzzoni on Nature's Rainbows.
Summary of luminescence responses:
Polylithionite (Mindat) (RRUFF)
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Yellow