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While externally similar shapes, these two minerals are very different inside.
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Pyrrhotite from
Major Mine (Sweet Marie; Rand group; June Ione), Alta Sierra, Greenhorn District (Greenhorn Mountains District), Kern County, California, USA


Locality type:Mine
Classification
Species:Pyrrhotite
Formula:Fe1-xS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrrhotite data
Locality Data:Click here to view Major Mine (Sweet Marie; Rand group; June Ione), Alta Sierra, Greenhorn District (Greenhorn Mountains District), Kern County, California, USA
Data Identifiers
Mindat Occurrence Record ID:327736
Long-form Identifier:1:3:327736:2
GUID (UUID V4):0
Nearest other occurrences of Pyrrhotite
0.3km (0.2 miles) ⓘUnspecified W occurrence [2], Alta Sierra, Greenhorn District (Greenhorn Mountains District), Kern County, California, USA
13.1km (8.1 miles) ⓘBig Blue group (North Extension Sumner; Jeff Davis; Bull Run; Beauregard; Urbana; Frank; Content; Big Blue-Sumner; Glue Gouge), Wofford Heights, Cove Mining District, Kern County, California, USA
13.5km (8.4 miles) ⓘHigh Grade Mine (Higrade Mine; Early Sunrise), Pennsylvania-Sunrise Group of Mines (Ana-Isabell claims; Pennsylvania claim; Pennsylvania vein; Sunrise vein; High Grade No. 1 claim; High Grade No. 2 claim), Keyesville (Keysville), Keyesville Mining District (Keysville Mining District), Kern County, California, USA
13.8km (8.6 miles) ⓘNob Hill Mine (Nob Hill prospect; Barlindo), Keyesville (Keysville), Keyesville Mining District (Keysville Mining District), Kern County, California, USA
14.9km (9.2 miles) ⓘMammoth Mine (Mammoth group of claim), Keyesville (Keysville), Keyesville Mining District (Keysville Mining District), Kern County, California, USA
25.8km (16.0 miles) ⓘPorter Mine (Venus Mine; Ophir Mine; McKeadney Mine; McKidney Mine; Old Bodfish Mine; Ederl group), Havilah, Clear Creek Mining District, Kern County, California, USA
51.5km (32.0 miles) ⓘCowboy Mine (Old Cowboy Mine; Gold Peak Mine; Gold Peak and Cowboy Mines; Zada Mine), Loraine, Loraine Mining District, Kern County, California, USA
54.2km (33.7 miles) ⓘBlackhawk Mine, Millersville, Loraine Mining District, Kern County, California, USA
55.5km (34.5 miles) ⓘUnnamed Cu occurrence [3], Mountain Home, Tulare County, California, USA
55.9km (34.7 miles) ⓘNadeau Mine (Rankin Mine), Morris Peak, Indian Wells Canyon Mining District, Kern County, California, USA
References
Hess, Frank L. & Esper S. Larsen (1922), Contact-metamorphic tungsten deposits of the United States: USGS Bulletin 725: 263.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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