MD90AA9: Aggregate of prismatic tetragonal Carletonite crystals with very well defined faces and edges, whose color is unusually intense, deep and uniform. They are partially coated by small yellowish Calcite crystals, with white Feldspar crystals. The three minerals have been analyzed and we will send a copy of the analyses to the buyer.
The specimen's photo has been reviewed and published in the magazine ‘Rocks & Minerals’ on page 51 in the volume 91, number 1, Jan/Feb 2016
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec  Canada (2003)

Specimen size: 4.7 × 2.6 × 2.4 cm = 1.85” × 1.02” × 0.94”

Main crystal size: 2.1 × 2.1 cm = 0.83” × 0.83”