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Jared Freiburg's Photo Gallery

X1V-AKCMarcasite, Pyrite

Conco Mine, North Aurora, Kane Co., Illinois, USA

SEM photomicrograph showing a tabular twinned marcasite crystal with an epitaxic pyrite crystal. From paragenetic event sulfide zone S-2 included in calcite cement. (http://www.ideals.illinois.edu/bitstream/handle/2142/16203/2_Freiburg_Jared.pdf?sequence=4)

Scale bar is 100 microns.
Copyright: © SagaMinerals      Photo ID: 464372     Uploaded by: Jared Freiburg   View Count: 140   Approval status: Public galleries    Type: Photo - 1424 x 968 pixels (1.4 Mpix)

6NT-N9PCalcite, Marcasite, Pyrite

Conco Mine, North Aurora, Kane Co., Illinois, USA

Calcite with inclusions of marcasite and pyrite; the specimen is 13.5 × 9 cm. Matt Zukowski specimen, Jeff Scovil photo. One of the best calcite scalenohedra to be found at Conco. It was on the roof of the Burrow Cavity near the outside edge. Amazing that it was undamaged during the initial pocket discovery blasting! One miner relayed to me that this pocket was discovered pre-2000. The mine super at the time had the loader bury the pocket out of fear that miners might "waste" time collecting and/or get injured. The miner who told me this remebered what pillar it was and over ten years later we excavated the area and sure enough...the pocket remained intact. Specimen was mined in 2010.
Copyright: © SagaMinerals      Photo ID: 464369     Uploaded by: Jared Freiburg   View Count: 318   Approval status: Public galleries    Type: Photo - 4288 x 2848 pixels (12.2 Mpix)

QYP-CP8Calcite, Marcasite, Pyrite

Conco Mine, North Aurora, Kane Co., Illinois, USA

Calcite zoned with marcasite and pyrite; the specimen is 18 × 15 cm. Jared Freiburg specimen, Jeff Scovil photo. A great example of the multiple generations of calcite mineralization events (at least 7) noted at Conco.
Copyright: © SagaMinerals      Photo ID: 464362     Uploaded by: Jared Freiburg   View Count: 136   Approval status: Public galleries    Type: Photo - 2848 x 4288 pixels (12.2 Mpix)

1LM-PELCalcite, Marcasite, Pyrite

Conco Mine, North Aurora, Kane Co., Illinois, USA

Calcite with marcasite and pyrite on dolomite; the specimen is 9 × 4 cm.
Jeff Scovil photo.
Copyright: © SagaMinerals      Photo ID: 464359     Uploaded by: Jared Freiburg   View Count: 139   Approval status: Public galleries    Type: Photo - 2848 x 4288 pixels (12.2 Mpix)

A8L-24DCalcite, Pyrite, Marcasite

Conco Mine, North Aurora, Kane Co., Illinois, USA

Calcite with marcasite and pyrite after Thalassinoides burrow; the specimen
is 10 × 2 cm. Jared Freiburg specimen, Jeff Scovil photo.
Copyright: © SagaMinerals      Photo ID: 464358     Uploaded by: Jared Freiburg   View Count: 151   Approval status: Public galleries    Type: Photo - 2848 x 4288 pixels (12.2 Mpix)

KWJ-DU5Calcite, Marcasite, Pyrite

Conco Mine, North Aurora, Kane Co., Illinois, USA

Twinned calcite with marcasite and pyrite; the specimen is 6.1 cm high. Jeff Scovil photo. Certainly one of the nicest twins I collected from Conco. 001 twin plane.
Copyright: © SagaMinerals      Photo ID: 464357     Uploaded by: Jared Freiburg   View Count: 158   Approval status: Public galleries    Type: Photo - 2848 x 4288 pixels (12.2 Mpix)

VJG-QHXPyrite

Conco Mine, North Aurora, Kane Co., Illinois, USA

Cubic pyrite cluster; the specimen is 10 × 6.5 cm.Jared Freiburg specimen, Jeff Scovil photo. It's very rare to find pyrite specimens at Conco larger than micron-scale.
Copyright: © SagaMinerals      Photo ID: 464356     Uploaded by: Jared Freiburg   View Count: 309   Approval status: Public galleries    Type: Photo - 4288 x 2848 pixels (12.2 Mpix)

56F-389Marcasite

Conco Mine, North Aurora, Kane Co., Illinois, USA

Marcasite stalactite cluster; the specimen is 15 ×10 cm. Dave Bird specimen, Jeff Scovil photo. Collected from a blast pile after blasing out a cavity during mining processes.
Copyright: © SagaMinerals      Photo ID: 464355     Uploaded by: Jared Freiburg   View Count: 166   Approval status: Public galleries    Type: Photo - 2848 x 4288 pixels (12.2 Mpix)

EUD-EY2Marcasite, Dolomite

Conco Mine, North Aurora, Kane Co., Illinois, USA

Marcasite on dolomite (“Brian’s Emerald”); the
specimen is 14 × 7.5 cm. Jared Freiburg specimen, Jeff Scovil photo. One vein of this super irridescent green marcasite was discovered by a miner. A few specimens were recovered and preserved before blasting.
Copyright: © SagaMinerals      Photo ID: 464354     Uploaded by: Jared Freiburg   View Count: 142   Approval status: Public galleries    Type: Photo - 4288 x 2848 pixels (12.2 Mpix)

PGA-RMUMarcasite

Conco Mine, North Aurora, Kane Co., Illinois, USA

Marcasite stalactite cluster (“Saguaro Cactus”); the specimen is 6.5 × 3.7 cm. Anthony Mendoza specimen,Jeff Scovil photo. Found in 2010 in a blast pile after a cavity was blasted out during mining processes.
Copyright: © SagaMinerals      Photo ID: 464353     Uploaded by: Jared Freiburg   View Count: 163   Approval status: Public galleries    Type: Photo - 2848 x 4288 pixels (12.2 Mpix)
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