El Potosí Mine, Chihuahua, Francisco Portillo, Santa Eulalia District, Mun. de Aquiles Serdán, Mexico
This rhodochrosite comes from the collection of the Sterling Hill Mining Museum and represents a locality which has never commonly produced any sort of rhodochrosite. This piece has excellent scalenohedral crystals that are gemmy and an orange red color. This vug matrix has an intricate structure that is different than the usual localities of rhodochrosite. The bright rhodochrosites appear to be outlined in black sulfides (which are likely manganese) as well as ivory and tan layers. This is a striking effect, and overall this is a fantastic example of a low producing area for rhodochrosite.