Provenite

Black Rock Mine

MineActiveDraft data

27.1333° S, 22.8333° E · ± 1 km

Rhodochrosite from Northern Cape, South Africa, with photos of specimens from this locality.

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Minerals found here

Rhodochrosite

On the same specimen

Same specimen Calcite with Rhodochrosite

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

Rhodochrosite at Black Rock Mine

Dark cherry-red rhodochrosite balls from the old Black Rock Mine, Kalahari Manganese Field.
Dark cherry-red rhodochrosite balls from the old Black Rock Mine, Kalahari Manganese Field.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
A gemmy layer of deep red botryoidal rhodochrosite over dark grey matrix, Black Rock Mine.
A gemmy layer of deep red botryoidal rhodochrosite over dark grey matrix, Black Rock Mine.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
A vein of gemmy rhodochrosite scalenohedra to 8 mm with calcite, Black Rock Mine.
A vein of gemmy rhodochrosite scalenohedra to 8 mm with calcite, Black Rock Mine.
Photo: Robert M. Lavinsky · CC BY-SA 3.0 · Source
Formula
MnCO₃
Morphology
Balls and botryoidal layers; veins of small scalenohedra
Typical size
Crystals to about 8 mm
Color / luster
Deep to dark cherry-red; gemmy, lustrous
Associated minerals
Calcite
Availability
Scarce
History
Older finds that predate the N'Chwaning discoveries

Sources: SRC-885 SRC-886 SRC-887

About Rhodochrosite →

Geology of the locality

Setting
Manganese ore of the Kalahari Manganese Field.
Region
Northern Cape
Country
South Africa

Coordinates from the Wikipedia article (rounded to the arc minute). The older Black Rock workings predate the N'Chwaning finds.

Sources: SRC-880

Sources

  1. SRC-880 · Website
    Black Rock mineWikipedia contributors · Wikipedia
  2. SRC-885 · Website
    File:Rhodochrosite-122376.jpgRobert M. Lavinsky · Wikimedia Commons (dealer label)
  3. SRC-886 · Website
    File:Rhodochrosite-168072.jpgRobert M. Lavinsky · Wikimedia Commons (dealer label)
  4. SRC-887 · Website
    File:Rhodochrosite-Calcite-117629.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.