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Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Rhodochrosite from
Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA


03535830017271979308955.jpg
Rhodochrosite

Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
06036980017271979418660.jpg
Rhodochrosite, etc.

Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
02047490017271979335585.jpg
Rhodochrosite, etc.

Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
02221760017271979279704.jpg
Rhodochrosite

Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
03535830017271979308955.jpg
Rhodochrosite

Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
06036980017271979418660.jpg
Rhodochrosite, etc.

Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
02047490017271979335585.jpg
Rhodochrosite, etc.

Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
02221760017271979279704.jpg
Rhodochrosite

Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
03535830017271979308955.jpg
Rhodochrosite

Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
06036980017271979418660.jpg
Rhodochrosite, etc.

Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
02047490017271979335585.jpg
Rhodochrosite, etc.

Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
02221760017271979279704.jpg
Rhodochrosite

Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
Locality type:Mine
Classification
Species:Rhodochrosite
Formula:MnCO3
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Quartz2
Galena2
Data
Mineral Data:Click here to view Rhodochrosite data
Locality Data:Click here to view Tanner Boy Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
Photo GalleryView Gallery (4 photos)
Data Identifiers
Mindat Occurrence Record ID:43445
Long-form Identifier:1:3:43445:6
GUID (UUID V4):0
Nearest other occurrences of Rhodochrosite
1.2km (0.7 miles) ⓘKite Lake, Mount Bross, Alma Mining District, Park County, Colorado, USA
1.6km (1.0 miles) ⓘSara Rose Mine, Mount Bross, Alma Mining District, Park County, Colorado, USA
2.0km (1.2 miles) ⓘRussia Mine, Mount Lincoln, Alma Mining District, Park County, Colorado, USA
2.3km (1.4 miles) ⓘSweet Home Mine, Detroit City Claim Block, Mount Bross, Alma Mining District, Park County, Colorado, USA
2.3km (1.4 miles) ⓘDetroit City Mine, Detroit City Claim Block, Mount Bross, Alma Mining District, Park County, Colorado, USA
5.0km (3.1 miles) ⓘJohn Reed Mine, Alicante, Lake County, Colorado, USA
6.8km (4.2 miles) ⓘClimax Mine, Climax, Climax Mining District, Lake County, Colorado, USA
13.5km (8.4 miles) ⓘMammoth Mine, Lake County, Colorado, USA
15.2km (9.5 miles) ⓘElla Beeler, Lake County, Colorado, USA
15.6km (9.7 miles) ⓘJulia Fisk Mine, Iowa Gulch, Leadville, Lake County, Colorado, USA
References
Emmons, S. F., Becker, G. F. (1885) Statistics and Technology of the Precious Metals. Bureau of the Census.
Dana, Edward Salisbury; Dana, James Dwight (1892) A System of Mineralogy (6th ed.). John Wiley & Sons, Inc.
 
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