TN87AL4: Aggregate of idiomorphic Brochantite crystals, with sharp faces and edges, very deep color, covered by a later growth, of very aerial fibrous crystals, lighter in color and with a satin luster.
We will send the specimen in its original Perky box from the Robert J. Noble collection, which also contains the label.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico

Specimen size: 3.2 × 2.1 × 1.4 cm = 1.26” × 0.83” × 0.55”

Main crystal size: 2.5 × 0.6 cm = 0.98” × 0.24”