RE27G0: An esthetic specimen, very aerial, in which are some crystals are elongated and some of them show the twin plane clearly, in a Calcite matrix.
Sr. Folch purchased the specimen in 1962, but, as documentation explains, it was probably mined around 1910.
Batopilas, Andrés del Río District, Municipio Batopilas, Chihuahua  Mexico (±1910)

Specimen size: 5.9 × 3.5 × 3.3 cm = 2.32” × 1.38” × 1.30”

Main crystal size: 1.7 × 0.2 cm = 0.67” × 0.08”