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Rhodochrosite from
N'Chwaning I Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa


Locality type:Mine
Classification
Species:Rhodochrosite
Formula:MnCO3
Comments:Numerous pockets of rhodochrosite crystals were found during the shaft sinking as well as mining with major discoveries in 1976-1978. The largest pocket measured 0.5 by 1.0 meter in size and produced a 100kg specimen. The red scalenohedrons were sold for 4 figure prices during the 1970's and 1980's.

Habits



03049200017362261862084.jpg
Scalenohedron:
The scalenohedral habit was relatively common and one could obtain single crystals as well as plates containing many crystals.
05566130017362261568760.jpg
Wheat sheaf:
The wheat sheaf habit consists of a central group of pale pink crystals becoming clearer and redder toward the terminations.
08569150017363083021032.jpg
Spherical aggregates:
Spheres of rhodochrosite are extremely rare, with a purported dozen specimens in total.
04116960017362262184740.jpg
Fan shaped aggregates:
Fan shaped aggregates are also believed to be extremely rare.
07188400017362261568784.jpg
Scalenohedrons with a flat terminations


Plate 64 from Wilson, Wendell. E.; Bartsch, Joel A.; Mauthner, Mark (2004) Masterpieces of the Mineral World. Houston Museum of Natural Science. [https://www.mindat.org/reference.php?id=18945017]
Habit:Scalenohedrons to 7cm, "wheat sheaf", spherical aggregates, rhombohedrons, fan shaped groups
Colour:Wine-red to pale pink
Quality for species:Excellent - world class for species or very significant. (!!)
Significance:Classic locality for this mineral (see references.)
Abundance at site:Very common
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Hausmannite
Manganite
Associated Minerals Based on Photo Data:
Shigaite126
Manganite73
Baryte14
Quartz12
- var Chalcedony4
Groutite10
Caryopilite6
Gageite5
Waterhouseite4
Pyrochroite4
Calcite4
Hausmannite3
Gypsum2
Andradite2
Manganese Oxides2
Gaudefroyite2
Ettringite2
Gatehouseite1
Bixbyite-(Mn)1
Data
Mineral Data:Click here to view Rhodochrosite data
Locality Data:Click here to view N'Chwaning I Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
Photo GalleryView Gallery (261 photos)
Data Identifiers
Mindat Occurrence Record ID:13079
Long-form Identifier:1:3:13079:0
GUID (UUID V4):0
Nearest other occurrences of Rhodochrosite
0.6km (0.3 miles) N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
2.4km (1.5 miles) N'Chwaning III Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
2.9km (1.8 miles) Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
3.7km (2.3 miles) Black Rock Mine, Black Rock, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
12.4km (7.7 miles) Hotazel Mine, Hotazel, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
12.8km (8.0 miles) Avontuur deposit, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
19.8km (12.3 miles) Perth Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
21.4km (13.3 miles) Smartt Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
25.6km (15.9 miles) Middelplaats Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
30.9km (19.2 miles) Mamatwan Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
References
 
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