RD47K4: Arborescent growth of crystals very much better defined than usual in this kind of sample, perfectly conserved. On the back of the Schneider's label that is with the specimen is written the year 1969.
New Cornelia Mine, Ajo, Little Ajo Mountains, Ajo District, Pima County, Arizona  USA (±1969)

Specimen size: 9.3 × 3.3 × 2.4 cm = 3.66” × 1.30” × 0.94”

Main crystal size: 0.5 × 0.5 cm = 0.20” × 0.20”