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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Calcite from
Irene Quarry, Irene, Boone County, Illinois, USA


Locality type:Quarry
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Pyrite1
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Irene Quarry, Irene, Boone County, Illinois, USA
Data Identifiers
Mindat Occurrence Record ID:432501
Long-form Identifier:1:3:432501:7
GUID (UUID V4):0
Nearest other occurrences of Calcite
9.3km (5.8 miles) ⓘMulford Quarry, Winnebago County, Illinois, USA
48.7km (30.3 miles) ⓘCole Quarry, Avon, Rock County, Wisconsin, USA
65.1km (40.4 miles) ⓘJuda, Jefferson, Green County, Wisconsin, USA
66.8km (41.5 miles) ⓘConco Mine, North Aurora, Kane County, Illinois, USA
76.8km (47.7 miles) ⓘFort Quarry (Hausz Brothers Inc.), Jefferson County, Wisconsin, USA
83.8km (52.1 miles) ⓘAdamson's quarry, Green County, Wisconsin, USA
84.9km (52.7 miles) ⓘElmhurst Underground No. 1, DuPage County, Illinois, USA
88.4km (54.9 miles) ⓘNewkirk lead mine, Green County, Wisconsin, USA
94.4km (58.6 miles) ⓘFitchburg Lead Mine, Fitchburg, Dane County, Wisconsin, USA
94.7km (58.9 miles) ⓘMount Carroll Quarry, Mount Carroll, Carroll County, Illinois, USA
References
Richards, R. Peter
Clopton, Edwin L
Jaszczak, John A
Richards, R. Peter, Clopton, Edwin L., Jaszczak, John A. (1995) Pyrite and Marcasite Intergrowths from Northern Illinois, in March - April 1995. The Mineralogical Record, 26 (2) Tucson. 129-138
 
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