Provenite

Emma Mine

MineClosedDraft data

46.0097° N, 112.5372° W · ± 1 km

Rhodochrosite from Montana, United States, with photos of specimens from this locality.

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Minerals found here

Rhodochrosite

Rhodochrosite at Emma Mine

Plate of translucent rose-red rhodochrosite rhombs to 1.6 cm on quartz-rich matrix, Butte, Montana.
Plate of translucent rose-red rhodochrosite rhombs to 1.6 cm on quartz-rich matrix, Butte, Montana.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Small cluster of frosted pink translucent rhodochrosite crystals to 1.5 cm from the Emma Mine.
Small cluster of frosted pink translucent rhodochrosite crystals to 1.5 cm from the Emma Mine.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Pastel-pink blocky rhodochrosite rhombs on massive rhodochrosite from the Emma Mine at Butte.
Pastel-pink blocky rhodochrosite rhombs on massive rhodochrosite from the Emma Mine at Butte.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
A lustrous translucent rose-red rhodochrosite rhomb capped by a smaller rhomb, Emma Mine, Butte.
A lustrous translucent rose-red rhodochrosite rhomb capped by a smaller rhomb, Emma Mine, Butte.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
A cabinet specimen with a 2.5 cm rhodochrosite rhomb among sharp rose-pink crystals, Emma Mine, Butte.
A cabinet specimen with a 2.5 cm rhodochrosite rhomb among sharp rose-pink crystals, Emma Mine, Butte.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Formula
MnCO₃
Morphology
Rhombs on massive rhodochrosite
Typical size
Rhombs to about 1.6 cm on photographed specimens
Color / luster
Pastel pink to rose-red
Associated minerals
Quartz
Availability
No longer available
History
Abandoned in 1957; rhodochrosite was a major gangue mineral and the mine was the state's most significant rhodochrosite producer

Sources: SRC-389 SRC-401

About Rhodochrosite →

Geology of the locality

Setting
Polymetallic deposit of the Butte district, formed at lower temperature than the central deposits such as the Leonard Mine.
Type
Hydrothermal
Host rock
Quartz monzonite (Butte Quartz Monzonite, Boulder Batholith)
Region
Montana
Country
United States

Coordinates from the Mindat locality page (46 deg 0 min 35 s N, 112 deg 32 min 14 s W). Abandoned in 1957; reclamation destroyed the mine site.

Sources: SRC-389

Sources

  1. SRC-389 · Database
    Emma Mine, Butte Mining District (Summit Valley Mining District), Silver Bow County, Montana, USAMindat.org contributors · Mindat.org / Hudson Institute of Mineralogy
  2. SRC-401 · Website
    Wikimedia Commons: Rhodochrosite-167913.jpg (Emma Mine)Lavinsky, R.M. · Wikimedia Commons

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.