Rhodochrosite, Pyrite - image 1
Photo by Tom Spann

Rhodochrosite, Pyrite

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Rhodochrosite with pyrite (nicknamed “The Worm”), 10.4 cm, believed to be from Santa Eulalia, Chihuahua, Mexico. Tom Spann photo. This specimen won the Romero Trophy for best Mexican mineral specimen on display at the 2015 Tucson Gem and Mineral Show. It was first illustrated in 1980 in the Mineralogical Record’s “What’s New in Minerals? (What’s OLD in minerals?)” captioned as coming from Santa Eulalia (vol. 11, no. 6, page 84). Mineralogical experts have seen nothing similar to this unique specimen that could confirm the locality.

Product details

SpeciesRhodochrosite, Pyrite
SizeCabinet
Dimensions10.4 cm
Added on02/13/2026
LocalityMexico, Chihuahua, Santa Eulalia Mining District
Publications
  • Mineralogical Record Mineral Collecting In Texas page 231
Current owner
Gail & Jim Spann

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Rhodochrosite
Mineral guide
Learn about Rhodochrosite
deep pink to rich red manganese carbonate with vitreous crystals, diverse crystal habits, and renowned localities prized by collectors.
Rhodochrosite
Regional guide
Rhodochrosite from Santa Eulalia Mining District
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Locality guide
Santa Eulalia Mining District
Santa Eulalia Mining District, Mexico — historic Ag-Pb-Zn locality prized for classic rhodochrosite, calcite, hemimorphite, creedite, fluorite and more.