Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
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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Calcite from
National Mine, Rockland, Ontonagon County, Michigan, USA


04243090017372825016767.jpg
Calcite, etc.

National Mine, Rockland, Ontonagon County, Michigan, USA
01220290017372825028635.jpg
Calcite, etc.

National Mine, Rockland, Ontonagon County, Michigan, USA
07529870017272054995636.jpg
Calcite, etc.

National Mine, Rockland, Ontonagon County, Michigan, USA
03145950017272041691922.jpg
Calcite, etc.

National Mine, Rockland, Ontonagon County, Michigan, USA
07529870017272054995636.jpg
Calcite, etc.

National Mine, Rockland, Ontonagon County, Michigan, USA
03145950017272041691922.jpg
Calcite, etc.

National Mine, Rockland, Ontonagon County, Michigan, USA
Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Native Copper2
Malachite1
Epidote1
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view National Mine, Rockland, Ontonagon County, Michigan, USA
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:100746
Long-form Identifier:1:3:100746:6
GUID (UUID V4):0
Nearest other occurrences of Calcite
0.3km (0.2 miles) ⓘMinesota Mine, Rockland, Ontonagon County, Michigan, USA
0.5km (0.3 miles) ⓘPeninsula Mine, Ontonagon County, Michigan, USA
1.2km (0.8 miles) ⓘRockland Mine, Rockland, Ontonagon County, Michigan, USA
1.6km (1.0 miles) ⓘMichigan Mine, Rockland, Ontonagon County, Michigan, USA
2.2km (1.4 miles) ⓘBumblebee Mine, Rockland, Ontonagon County, Michigan, USA
2.8km (1.7 miles) ⓘLake Superior Mine, Ontonagon County, Michigan, USA
3.0km (1.9 miles) ⓘFlintsteel Mine, Mass City, Ontonagon County, Michigan, USA
3.9km (2.4 miles) ⓘFlintsteel River Mine, Ontonagon County, Michigan, USA
4.9km (3.1 miles) ⓘVictoria Mine, Victoria, Ontonagon County, Michigan, USA
5.1km (3.2 miles) ⓘCaledonia Mine, Mass City, Ontonagon County, Michigan, USA
References
Morris, Tom (1983) Michigan Mineralogy. A locality Index. Rocks & Minerals, 58 (3). 107-113 doi:10.1080/00357529.1983.11767128p.112
 
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