Provenite

Eagle Mine (Gilman)

MineClosedDraft data

39.5278° N, 106.3949° W · ± 1 km

Pyrite and Rhodochrosite from Colorado, United States, with photos of specimens from this locality.

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Minerals found here

PyriteRhodochrosite

On the same specimen

Same specimen Sphalerite with Rhodochrosite

4 specimen photo(s) from this locality show rhodochrosite with sphalerite together. The pairing comes from the photographer's file name and label, so the relationship between the two minerals is not specified.

Same specimen Chalcopyrite with Rhodochrosite

1 specimen photo(s) from this locality show rhodochrosite with chalcopyrite together. The pairing comes from the photographer's file name and label, so the relationship between the two minerals is not specified.

Pyrite at Eagle Mine (Gilman)

Known among collectors for striated pyritohedral crystals.

Cluster of striated pyritohedral pyrite crystals from the Eagle Mine, Gilman, Colorado.
Cluster of striated pyritohedral pyrite crystals from the Eagle Mine, Gilman, Colorado.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Large cluster of lustrous pyritohedra from the Eagle Mine, Colorado.
Large cluster of lustrous pyritohedra from the Eagle Mine, Colorado.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Two intergrown striated pyritohedrons from the Eagle Mine, Gilman.
Two intergrown striated pyritohedrons from the Eagle Mine, Gilman.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Formula
FeS₂
Morphology
Pyritohedra; cubes
Typical size
Crystals to about 2.7 cm; cubes to about 0.6 cm
Surface features
Striated faces
History
Specimens come from the Gilman district mine, worked from the 1880s until 1984.

Sources: SRC-405 SRC-410 SRC-411 SRC-412

About Pyrite →

Rhodochrosite at Eagle Mine (Gilman)

Pink platy rhodochrosite on sphalerite rather than blocky rhombs.

Pink bladed rhodochrosite crystals on sphalerite from the Eagle Mine, Gilman.
Pink bladed rhodochrosite crystals on sphalerite from the Eagle Mine, Gilman.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Lustrous light pink rhodochrosite blades on two mounds of sphalerite, Eagle Mine.
Lustrous light pink rhodochrosite blades on two mounds of sphalerite, Eagle Mine.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Platy pink rhodochrosite with bright pyrite on a sphalerite plate, Eagle Mine.
Platy pink rhodochrosite with bright pyrite on a sphalerite plate, Eagle Mine.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Pastel-pink rhodochrosite rhombs to 1.5 cm on sphalerite and chalcopyrite, Eagle Mine.
Pastel-pink rhodochrosite rhombs to 1.5 cm on sphalerite and chalcopyrite, Eagle Mine.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Formula
MnCO₃
Morphology
Platy to bladed ('toenail') crystals and rhombs on sphalerite
Typical size
Rhombs to about 1.5 cm
Color / luster
Light to pastel pink, lustrous
Associated minerals
Sphaleritepyritechalcopyrite
Availability
Scarce

Sources: SRC-897 SRC-898 SRC-899

About Rhodochrosite →

Geology of the locality

Setting
Pb-Zn-Ag-Cu mining district near Gilman, Eagle County
Region
Colorado
Country
United States

Mine worked from the 1880s until 1984, later flooded and listed as a Superfund site. Coordinates from the Wikipedia mine page.

Sources: SRC-410 SRC-411 SRC-412

Sources

  1. SRC-410 · Website
    Eagle Mine (Colorado)Wikipedia contributors · 2024 · Wikipedia
  2. SRC-411 · Database
    Pyrite: Colorado, Eagle County, Gilman, Eagle Mine 20-LevelColorado School of Mines, Arthur Lakes Library · 2003 · Colorado School of Mines Geology Museum digital collection
  3. SRC-412 · Website
    Eagle Mine summaryColorado Department of Public Health and Environment · CDPHE
  4. SRC-405 · Website
    Pyrite photographs and file descriptions on Wikimedia CommonsRobert M. Lavinsky (photographer; file descriptions) · Wikimedia Commons
  5. SRC-897 · Website
    File:Rhodochrosite-Sphalerite-280315.jpgRobert M. Lavinsky · Wikimedia Commons (dealer label)
  6. SRC-898 · Website
    File:Rhodochrosite-Sphalerite-38318.jpgRobert M. Lavinsky · Wikimedia Commons (dealer label)
  7. SRC-899 · Website
    File:Rhodochrosite-Sphalerite-Chalcopyrite-230562.jpgRobert M. Lavinsky · Wikimedia Commons (dealer label)

Draft data from the Provenite workbook. Check entries against the cited sources before relying on them. Photos are open-licence images from Wikimedia Commons; the author and licence are given with each photo.