Carletonite

Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec  Canada (2002)

Specimen size: 3.6 × 2.8 × 1.9 cm = 1.42” × 1.10” × 0.75”
Main crystal size: 1.5 × 1 cm = 0.59” × 0.39”