TP86R9: Groups of transparent cubic crystals of a deeper color than usual for this kind of sample. The crystals show surfaces with polycrystalline growths on the octahedron faces and are implanted on a matrix with bright cub-octahedral crystals of Galena.
The sample is from the prestigious collection of Dr. Marvin D. Rausch (Massachusetts), whose label we'll send to the buyer.
Naica, Municipio Saucillo, Chihuahua  Mexico (±1986)

Specimen size: 15 × 13 × 11 cm = 5.91” × 5.12” × 4.33”

Main crystal size: 7.2 × 6.6 cm = 2.83” × 2.60”