Dims: 2.6" x 1.9" x 1.7" (6.6 x 4.8 x 4.3 cm)
Wt: 4.4 oz. (125.2 g)
Mapimi, Durango, Mexico
This small hand specimen consists of several clusters of radiating Hemimorphite blades that rest in a shallow hollow in a goethite and limonite host rock. The largest of these clusters has dimensions of 0.6 x 0.4 x 0.3" (1.5 x 1.0 x 0.8 cm) and is in fair condition, as several of its blades are broken and incomplete. One of the other clusters is also mostly incomplete. The crystals that are intact, however, have excellent orthorhombic bladed form, with sharp edges and clean faces that possess a bright pearly luster. All are colorless, transparent, and due to their thinness, very clear. Their average length is between 0.3" and 0.4" (8 and 10 mm) The hollow in which they rest is lined with smaller Hemimorphite blades and what appear to be some tiny rhombohedral calcites. Under these is a pale green conichalcite crust that coats the hollow's surface. This crust has a matte luster and shows tiny reniform or botryoidal formations that are mostly coated by the calcite and hemimorphite. There are a few other, smaller hollows in the host rock that also contain the aforementioned minerals, but most of the crystals therein are damaged and/or incomplete.