MC89AA9: Aggregate of very sharp prismatic tetragonal Carletonite crystals, some of them more isolated than usual, whose color is unusually intense, deep and uniform. They are on a Calcite matrix and partially coated by small, white, Feldspar crystals. The three minerals have been analyzed and we will send a copy of the analyses to the buyer.
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec  Canada (2003)

Specimen size: 3.9 × 3 × 2.4 cm = 1.54” × 1.18” × 0.94”