Dims: 1.7 x 1.2 x 0.9" (4.3 x 3.0 x 2.2 cm)
Wt: 23 g
San Mateo Vein, San Luis Mine, Fresnillo, Zacatecas, Mexico
A cluster of several intergrown Acanthite crystals rests on the calcite base of this small hand specimen. These crystals are small, not exceeding 0.3" (8 mm) in diameter and are in moderately good condition, as several are noticeably damaged or broken. Where intact, however, they have excellent pseudocubic form that takes on the shape of octahedrons and cubo-octahedrons. They have the standard dark silvery-gray color and dull metallic luster and are intergrown with a bed of similarly-sized calcites that have a milky-white color.