3M12: Botryoidal growths of micro-crystals of Duftite, some of them very well defined under a binocular microscope. They are clear green to slightly darker green and their luster varies from bright to dull, associated with transparent and colorless crystals of Calcite, coating a limonite matrix.
Ojuela Mine, Mapimí, Municipio Mapimí, Durango  Mexico (2012)

Specimen size: 6.0 × 4.3 × 2.7 cm = 2.36” × 1.69” × 1.06”