San Luis Mine, Fresnillo, Zacatacas, Mexico
Thumbnail, 2.5 x 2.3 x 2.3 cm
Ex. Richard Heck
This magnificent acanthite crystal is perched on a stem of more slender acanthite. It has brilliant luster, great form and a dark metallic color, and measures a whopping 2.2 cm across. It is absolutely a world-class thumbnail and a superb competition quality specimen of the species.