Unusual purple Weloganite crystals from the Francon Quarry, Montréal, Québec, Canada. Rare violet-tinged carbonate—color likely caused by natural irradiation/color centers—displaying excellent crystal form, lustre, and partial matrix. Its associated with little white balls of Dresserite. From a now-closed and historically important locality; an exceptional specimen for collectors of rare carbonates and Montreal minerals. 9.4 x 7.8 x 4.9 cm