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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Tourmaline from
Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA


04242080017272731391980.jpg
Tourmaline

Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
00681780017272049144093.jpg
Elbaite

Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
02682100017272022127557.jpg
Elbaite

Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
02315850017731055781924.jpg
Tourmaline

Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
04242080017272731391980.jpg
Tourmaline

Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
00681780017272049144093.jpg
Elbaite

Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
00924520017368136806705.jpg
Elbaite

Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
09883750017363301596481.jpg
Tourmaline

Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
04242080017272731391980.jpg
Tourmaline

Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
00681780017272049144093.jpg
Elbaite

Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
01870940017272022203888.jpg
Elbaite

Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
08658650017363301606423.jpg
Tourmaline

Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
Locality type:Mine
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:AD3G6(T6O18)(BO3)3X3Z
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Apatite2
Monazite-(Ce)2
Albite2
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
Photo GalleryView Gallery (5 photos)
Data Identifiers
Mindat Occurrence Record ID:988036
Long-form Identifier:1:3:988036:8
GUID (UUID V4):0
Localities for Tourmaline in this Region
Brown Derby No. 1, Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
Brown Derby No. 3, Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
Brown Derby No. 5 Mine, Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
Nearest other occurrences of Tourmaline
0.1km (0.1 miles) ⓘBrown Derby No. 1, Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
1.1km (0.7 miles) ⓘBrown Derby No. 5 Mine, Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison County, Colorado, USA
22.6km (14.0 miles) ⓘGreen Mountain Mining District (Gold Basin Mining District; Iris Mining District), Gunnison County, Colorado, USA
23.3km (14.5 miles) ⓘLucky Strike Mine (Modoc; MS 17455; Horse Shoe; MS 17122; Belle Valaisane; MS 13897; Only Chance; MS 17455; Mammoth; MS 13897; Patented Claims: Lucky Strike; MS 9125), Green Mountain Mining District (Gold Basin Mining District; Iris Mining District), Gunnison County, Colorado, USA
25.9km (16.1 miles) ⓘGold Basin District Occurrence (MS 1984; Patented Claim: Belle Flora), Green Mountain Mining District (Gold Basin Mining District; Iris Mining District), Gunnison County, Colorado, USA
26.0km (16.2 miles) ⓘGunnison District Occurrence (W.C. Dillon; MS 10715), Gunnison Mining District, Gunnison County, Colorado, USA
27.0km (16.8 miles) ⓘDenver City Mine, Green Mountain Mining District (Gold Basin Mining District; Iris Mining District), Gunnison County, Colorado, USA
33.0km (20.5 miles) ⓘCalifornia Mine, Upper Browns Creek area, Nathrop, Chaffee County, Colorado, USA
35.3km (22.0 miles) ⓘUnnamed Uranium - Feldspar Mine (MRDS - 10013132), Saguache County, Colorado, USA
47.0km (29.2 miles) ⓘLittle Johnnie Mine (Cathey Nos. 1-5; Unpatented Claims: Little Johnnie Nos. 1-2; Charley Nos. 1-5; Little Johnnie Extension), Goose Creek Mining District, Gunnison County, Colorado, USA
References
Rocks & Min.: 24:233-234.
 
and/or  
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