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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Cordierite from
Caprock prospect, Pearl Mining District, Jackson County, Colorado, USA


Locality type:Prospect
Classification
Species:Cordierite
Formula:Mg2Al4Si5O18
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cordierite data
Locality Data:Click here to view Caprock prospect, Pearl Mining District, Jackson County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:427946
Long-form Identifier:1:3:427946:4
GUID (UUID V4):0
Nearest other occurrences of Cordierite
4.1km (2.6 miles) ⓘPearl Mine, Swede Group mine (Round Top; Big Horn; Copper Queen), Pearl Mining District, Jackson County, Colorado, USA
38.5km (23.9 miles) ⓘMedicine Bow Mountains, Jackson County, Colorado, USA
44.2km (27.4 miles) ⓘGreenville Mine (Greenville Shaft prospect), Clark, Routt County, Colorado, USA
References
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.
Spry, Paul G.; McFadden, Scott; Teale, Graham S.; Alers, Brian; Shallow, John M.; Glenn, Justin M. (2022) Nodular sillimanite rocks as field indicators to metamorphosed massive sulfide deposits. Ore Geology Reviews, 141. 104632 doi:10.1016/j.oregeorev.2021.104632
Berke, Edward H., Spry, Paul G., Heimann, Adriana, Teale, Graham S., Johnson, Benjamin, von der Handt, Anette, Alers, Brian, Shallow, John M. (2023) The genesis of metamorphosed Paleoproterozoic massive sulphide occurrences in central Colorado: geological, mineralogical and sulphur isotope constraints. Geological Magazine, 160 (7) 1345-1375 doi:10.1017/s0016756823000407
 
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