Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Ferroselite from
Pickett Corral Mine, Montrose County, Colorado, USA


Locality type:Mine
Classification
Species:Ferroselite
Formula:FeSe2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Ferroselite data
Locality Data:Click here to view Pickett Corral Mine, Montrose County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:1654825
Long-form Identifier:1:3:1654825:5
GUID (UUID V4):0
Nearest other occurrences of Ferroselite
14.0km (8.7 miles) ⓘFirecracker No. 1 Mine, Montrose County, Colorado, USA
14.3km (8.9 miles) ⓘLong Park No. 12 Mine, Montrose County, Colorado, USA
14.4km (9.0 miles) ⓘTriangulation Mine, Montrose County, Colorado, USA
14.5km (9.0 miles) ⓘBitter Creek Mine, Paradox Valley, Montrose County, Colorado, USA
14.8km (9.2 miles) ⓘVirgin No. 3 Mine, Paradox Valley, Montrose County, Colorado, USA
16.0km (10.0 miles) ⓘVanadium King Mine, Montrose County, Colorado, USA
18.7km (11.6 miles) ⓘBarkley; Shattuck - Denn; La Salle, Montrose County, Colorado, USA
19.0km (11.8 miles) ⓘLa Salle Mine (La Salle Group), Montrose County, Colorado, USA
28.6km (17.8 miles) ⓘKing No. 4, King Mine, San Miguel County, Colorado, USA
91.7km (57.0 miles) ⓘCactus Rat Mine, The Poison Strip, Thompsons Mining District, Grand County, Utah, USA
References
Carnegie Museum of Natural History analysisIdentified by Chris Emproto: XRD, SEM-EDS
Olds, T.A.; Emproto, C.; Kampf, A.R.; Ma, C.; Marty, J. (2026) Szilagyiite, a new uranyl carbonate-selenite mineral related to schröckingerite from the Pickett Corral mine, Montrose County, Colorado, USA. Journal of Geosciences, 70 (3). p.177-188. doi:10.3190/jgeosci.0049.25
 
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