Dims: 4.1 x 2.8 x 2.3" (10.3 x 7.1 x 5.8 cm)
Wt: 15.2 oz. (431 g)
Zacatecas City, Zacatecas, Mexico
Several small, rounded Polybasite rosettes rest on the gray base rock of this cabinet specimen. The largest of these rosettes measures about 0.4" (1.0 cm) in diameter and shows the most damage, being the most exposed - some of the blades that make up the rosette are slightly crushed - the others are in excellent condition. All have a dark, black-gray color and a dull luster, though the damaged areas show its metallic luster. The smaller rosettes are difficult to study, as they are coated with tiny quartz crystals. The rosettes themselves rest amid a thick crust of milky-white, crystalline quartz that coats the gray base rock.