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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Dolomite from
Twin Buttes Mine, Twin Buttes, Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA


Locality type:Mine
Classification
Species:Dolomite
Formula:CaMg(CO3)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Dolomite data
Locality Data:Click here to view Twin Buttes Mine, Twin Buttes, Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:258229
Long-form Identifier:1:3:258229:0
GUID (UUID V4):0
Nearest other occurrences of Dolomite
11.1km (6.9 miles) ⓘMission pit, Mission complex, San Xavier, Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA
30.4km (18.9 miles) ⓘSt. Louis Mine (Morning Star Mine; Isabel), St. Louis Gulch, Hughes Gulch, Greaterville placer deposits, Greaterville, Greaterville Mining District, Pima County, Arizona, USA
35.8km (22.3 miles) ⓘAlto Mine group (Alto vein swarm), Alto Hill, Salero area, Tyndall Mining District, Santa Cruz County, Arizona, USA
58.3km (36.2 miles) ⓘAqua Verde Mine, Pima County, Arizona, USA
60.9km (37.8 miles) ⓘPatagonia Mountains, Santa Cruz County, Arizona, USA
63.3km (39.3 miles) ⓘSouthern Whetstone Mountains Gypsum occurrence, Cochise County, Arizona, USA
64.6km (40.1 miles) ⓘSilver Hill Mine group, Silver Hill, Silver Hill Mining District, Waterman Mining District, Pima County, Arizona, USA
66.8km (41.5 miles) ⓘHolland Mine, Duquesne Gulch, Nash Mines group (Duquesne-Washington group), Duquesne-Washington Camp, Patagonia Mining District, Patagonia Mountains, Santa Cruz County, Arizona, USA
78.3km (48.6 miles) ⓘJesse Benton Mine (Morajeski property; Jesse Bentan Mine; El Capitan; Dolores; Buckhorn; Silver Hoard group; Pearl E. group; Owl), Guild Wash, Owl Head Buttes area, Owl Head Mining District, Tortolita Mountains, Pinal County, Arizona, USA
79.1km (49.1 miles) ⓘMaudina Mine (Campo Bonito gp; Bonito Mines; Other claims; Maudina claims/property), Campo Bonito Mines, Campo Bonito, Oracle Mining District, Pinal County, Arizona, USA
References
Galbraith, F. W. (1947) Minerals of Arizona (Second Edition, Revised). University of Arizona Bulletin 153. Arizona Bureau of Mines
 
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