Dims: 1.9" x 1.6" x 1.4" (4.8 x 4.1 x 3.6 cm)
Wt: 1.90 oz. (53.8 g)
Mina de Ojuela, Mapimi, Durango, Mexico
The decayed goethite host rock of this specimen is host to a beautiful crust of intergrown botryoidal Rosasite clusters. All are in excellent condition, showing almost no damage, and are quite small, not exceeding 0.2" (5 mm) in diameter. Each is made up of countless tiny, monoclinic needles of Rosasite that are tightly associated in acicular, radiating sprays. The crystals have a moderate aqua-blue coloration and are translucent. When clustered together, they give the crust a velvety luster. This crust covers at least 30% of the host rock's surface area. There is another crust of Rosasite coating part of the host rock, but this has a much paler coloration and lacks discernable crystals and botryoidal form. There are also several isolated botryoidal sprays elsewhere on the host rock, but these are tiny, and often damaged or incomplete.