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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
Conco Mine, North Aurora, Kane County, Illinois, USA


04680980017366515843618.jpg
Calcite, etc.

Conco Mine, North Aurora, Kane County, Illinois, USA
09617300017272276682034.jpg
Calcite, etc.

Conco Mine, North Aurora, Kane County, Illinois, USA
01453640017272276707113.jpg
Calcite

Conco Mine, North Aurora, Kane County, Illinois, USA
04968660017272276707859.jpg
Calcite

Conco Mine, North Aurora, Kane County, Illinois, USA
01723790017365073713305.jpg
Calcite, etc.

Conco Mine, North Aurora, Kane County, Illinois, USA
04505250017366515859914.jpg
Calcite, etc.

Conco Mine, North Aurora, Kane County, Illinois, USA
09799020017366515854039.jpg
Calcite

Conco Mine, North Aurora, Kane County, Illinois, USA
02201770017366515865630.jpg
Calcite

Conco Mine, North Aurora, Kane County, Illinois, USA
05075450017366515864031.jpg
Calcite, etc.

Conco Mine, North Aurora, Kane County, Illinois, USA
09617300017272276682034.jpg
Calcite, etc.

Conco Mine, North Aurora, Kane County, Illinois, USA
01453640017272276707113.jpg
Calcite

Conco Mine, North Aurora, Kane County, Illinois, USA
00453440017366515873410.jpg
Calcite

Conco Mine, North Aurora, Kane County, Illinois, USA
Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Marcasite26
Pyrite23
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Conco Mine, North Aurora, Kane County, Illinois, USA
Photo GalleryView Gallery (23 photos)
Data Identifiers
Mindat Occurrence Record ID:705286
Long-form Identifier:1:3:705286:6
GUID (UUID V4):0
Nearest other occurrences of Calcite
31.7km (19.7 miles) ⓘElmhurst Underground No. 1, DuPage County, Illinois, USA
49.6km (30.8 miles) ⓘMorris City Pit, Grundy County, Illinois, USA
57.5km (35.7 miles) ⓘCoal City, Grundy County, Illinois, USA
66.8km (41.5 miles) ⓘIrene Quarry, Irene, Boone County, Illinois, USA
75.2km (46.7 miles) ⓘMulford Quarry, Winnebago County, Illinois, USA
81.3km (50.5 miles) ⓘIllinois Cement Company Quarry, LaSalle County, Illinois, USA
84.1km (52.3 miles) ⓘVermilion Quarry, LaSalle County, Illinois, USA
96.1km (59.7 miles) ⓘSix-Pak lamprophyre diatreme (Six Pack pipe), Kenosha, Kenosha County, Wisconsin, USA
References
Specimens field collected by Jared Freiburg
Freiburg, J. and Rakovan, J. (2012) The Conco Mine, North Aurora, Kane County, Illinois. Rocks & Minerals, 87, #2, 116-125.
 
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