- Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Monteregie, Quebec, Canada
- Thumbnail, 1.4 x 0.9 x 0.5 cm
A sharp thumbnail window pane of transparent catapleiite nicely accented with an aegirine crystal on the back. The crystal has sharp, beveled edges. A gem specimen of one of the most desirable Mt. St-Hilaire species. Rare when this clean.