Leucophanite and Polylithionite - Mt. St. Hilaire, Canada

Contributed by: Mark Cole
Date: Mar 24th, 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)

Description:
Leucophanite is pink. Polylithionite is yellowish white. Albite is red.

Originally posted by Mark Cole on Nature's Rainbows in 2015.

Fluorescence under shortwave UV light.

Normal light.

Summary of luminescence responses:

Leucophanite (Mindat) (RRUFF)

• Fluorescence under Shortwave (255nm LED) UV light: Pink

• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Yellow

• Fluorescence under Shortwave (255nm LED) UV light: Red