Poudrette Quarry, Mont Saint-Hilaire, Rouville RCM, Monteregie, Qu�bec, Canada
Fluorescent SW
KLi2Al(Si4O10)(F,OH)2
A well formed rosette of Polylithionite crystals with attached Serandite. The specimen is a nice yellow under shortwave UV (a bit brighter than in the last photo).