RE16G6: Crystals reach a considerable size and have an excellent luster. They show equal development of rhombohedral and trapezohedral forms, with some other faces of the cubic system. One of the crystals has a contact on one of its faces. A good sample from this classic American locality.
Calaveras County, California  USA (±1958)

Specimen size: 4.7 × 3.7 × 2.9 cm = 1.85” × 1.46” × 1.14”

Main crystal size: 3.4 × 2.7 cm = 1.34” × 1.06”