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Tourmaline from
Brown Derby No. 5 Mine, Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison Co., Colorado, USA

Locality type:Mine
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:A(D3)G6(Si6O18)(BO3)3X3Z
Confirmation
Validity:Believed Valid
References
References:USGS Proffesional Paper 265
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view Brown Derby No. 5 Mine, Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison Co., Colorado, USA
Nearest other occurrences of Tourmaline
1.1km (0.7 miles) Brown Derby No. 1, Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison Co., Colorado, USA
1.1km (0.7 miles) Brown Derby Mine, Quartz Creek Pegmatite Mining District, Gunnison Co., Colorado, USA
23.0km (14.3 miles) Green Mountain Mining District (Gold Basin Mining District; Iris Mining District), Gunnison Co., Colorado, USA
23.6km (14.7 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 Co., Colorado, USA
26.0km (16.2 miles) Gunnison District Occurrence (W.C. Dillon; MS 10715), Gunnison Mining District, Gunnison Co., Colorado, USA
26.1km (16.2 miles) Gold Basin District Occurrence (MS 1984; Patented Claim: Belle Flora), Green Mountain Mining District (Gold Basin Mining District; Iris Mining District), Gunnison Co., Colorado, USA
27.3km (17.0 miles) Denver City Mine, Green Mountain Mining District (Gold Basin Mining District; Iris Mining District), Gunnison Co., Colorado, USA
35.9km (22.3 miles) Mt Antero, Chaffee Co., Colorado, USA
36.1km (22.4 miles) Unnamed Uranium - Feldspar Mine (MRDS - 10013132), Marshall Pass Mining District, Saguache Co., Colorado, USA
47.3km (29.4 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 Co., Colorado, USA
 
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