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While externally similar shapes, these two minerals are very different inside.
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Arsenopyrite from
Pentland Mine (Arizona Copper property), Big Bug Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USA


Locality type:Mine
Classification
Species:Arsenopyrite
Formula:FeAsS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Arsenopyrite data
Locality Data:Click here to view Pentland Mine (Arizona Copper property), Big Bug Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:246705
Long-form Identifier:1:3:246705:4
GUID (UUID V4):0
Nearest other occurrences of Arsenopyrite
2.4km (1.5 miles) ⓘButternut Mine (Claims MS 1434 and 3768; Good Luck group), Big Bug, Big Bug Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USA
3.0km (1.9 miles) ⓘBoggs Mine (Boggs Patented 908 claim), Big Bug Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USA
6.3km (3.9 miles) ⓘMcCabe-Gladstone Mine (McCabe Mine; Gladstone Mine; Monopolist claim; Sink To Rise claim; Gladstone claim), Silver Belt-McCabe vein, Galena Gulch area, McCabe, Big Bug Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USA
7.8km (4.9 miles) ⓘBinghampton Mine, Mayer, Agua Fria Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USA
7.9km (4.9 miles) ⓘCopper Queen Mine, Mayer, Agua Fria Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USA
8.6km (5.4 miles) ⓘIron King Mine (Lime Rock Patented claim 1714; Copper Platter Patented claim 1714; Patented claims 1714), Humboldt, Big Bug Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USA
9.8km (6.1 miles) ⓘBlue Bell Mine (Blue Bell Mine and Quarry; Patented claims 1528; Blue Coat vein; Blue Buck claim), Mayer, Big Bug Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USA
11.8km (7.3 miles) ⓘSheldon Mine (Sheldon Superior; Chase property; Black Lode claim; Chase Mine; Capital vein; French Sheldon; Cresent; Patented claims MS 1173; 1354; 1355; 1359; 2360 & 3287), Walker, Walker Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USA
15.5km (9.6 miles) ⓘDe Soto Mine (Patented claims MS 1462 & 1463; Copper Link; Whale), Battle Flat, Peck Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USA
19.0km (11.8 miles) ⓘMark Twain Mine, Hassayampa Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USA
References
Lindgren, W. (1926), USGS Bull. 782: 141.
 
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