Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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Magnetite from
Cartwright Calcite Deposit (Cartwright Crystal Spar Group), Sweet Grass County, Montana, USA


Locality type:Deposit
Classification
Species:Magnetite
Formula:Fe2+Fe23+O4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Magnetite data
Locality Data:Click here to view Cartwright Calcite Deposit (Cartwright Crystal Spar Group), Sweet Grass County, Montana, USA
Data Identifiers
Mindat Occurrence Record ID:1647707
Long-form Identifier:1:3:1647707:2
GUID (UUID V4):0
Nearest other occurrences of Magnetite
27.1km (16.8 miles) ⓘPicket Pins prospect (Picket Pin occurrence), Sweet Grass County, Montana, USA
30.1km (18.7 miles) ⓘMonkey East Camp Zone Occurrence (J-M Reef), Sweet Grass County, Montana, USA
30.2km (18.8 miles) ⓘFrog Pond West Occurrence (J-M Reef), Sweet Grass County, Montana, USA
30.2km (18.8 miles) ⓘJanet 50 Occurrence, Sweet Grass County, Montana, USA
30.5km (19.0 miles) ⓘWest Fork East Adit Occurrence (J-M Reef), Sweet Grass County, Montana, USA
31.2km (19.4 miles) ⓘIron Mountain Ni-Cu Iron Creek Occurrence, Sweet Grass County, Montana, USA
31.2km (19.4 miles) ⓘStillwater Mine, Stillwater County, Montana, USA
31.3km (19.4 miles) ⓘChrome Mountain Ni-Cu Occurrence, Sweet Grass County, Montana, USA
31.6km (19.6 miles) ⓘForge Ni-Cu Occurrence (Boulder Forge; Placer Basin), Sweet Grass County, Montana, USA
31.7km (19.7 miles) ⓘInitial Ni-Cu Occurrence, Sweet Grass County, Montana, USA
References
(1958) Optical calcite deposits in Park and Sweet Grass Counties, Montana. Bulletin 1042m. US Geological Survey doi:10.3133/b1042m p.448
 
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