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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Plagioclase from
Crystal No. 8 Mine, Chaffee County, Colorado, USA


Locality type:Mine
Classification
Species:'Plagioclase' (not an IMA approved species)
Formula:(Na,Ca)[(Si,Al)AlSi2]O8
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Plagioclase data
Locality Data:Click here to view Crystal No. 8 Mine, Chaffee County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:149020
Long-form Identifier:1:3:149020:6
GUID (UUID V4):0
Nearest other occurrences of Plagioclase
3.3km (2.0 miles) ⓘNewett Quarries, Chaffee County, Colorado, USA
19.2km (12.0 miles) ⓘBuffalo Peaks, Chaffee County, Colorado, USA
20.3km (12.6 miles) ⓘMica-Beryl Mine (MRDS - 10013705), Turret Mining District, Chaffee County, Colorado, USA
22.4km (13.9 miles) ⓘAce High - Jackpot Prospect, Turret Mining District, Chaffee County, Colorado, USA
23.2km (14.4 miles) ⓘOld Glory claim (Last Chance prospect; Last Chance Spar-Mica Dyke prospect), Turret Mining District, Chaffee County, Colorado, USA
37.6km (23.3 miles) ⓘMeyers Ranch, Guffey Mining District, Park County, Colorado, USA
41.2km (25.6 miles) ⓘBetty Mine (Lone Chimney Mine; Betty Lowe), Guffey Mining District, Park County, Colorado, USA
42.9km (26.7 miles) ⓘBon Ton Mine, Monarch Mining District, Chaffee County, Colorado, USA
47.4km (29.4 miles) ⓘBeryllium Lode Prospect, Micanite Mining District (Currant Creek Mining District), Colorado, USA
49.2km (30.6 miles) ⓘPine Ridge pegmatite, Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
References
Heinrich, E. Wm. (1948) Fluorite-rare earth mineral pegmatites of Chaffee and Fremont Counties, Colorado. American Mineralogist, 33 (1-2). 64-75
Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227
Pearl, Richard M. (1958) Colorado Gem Trails and Mineral Guide (1st ed.) Sage Books, Denver, CO.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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