Calcite, Dolomite
Saint-Eustache Quarry, Saint-Eustache, Deux-Montagnes RCM, Laurentides, Québec, Canada
Calcite crystals, on dolomite, shown fluorescing under midwave UV/UV-B (310 nm UV-B LEDs). Self-collected in 2012, a few years before this quarry became closed to collectors.
Alas, I didn't have UV lamps back then, I got into fluorescent minerals only in 2018, 15 years after I started collecting minerals; otherwise, I'd have collected a lot ...