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Cummingtonite from
Homestake Mine, Lead, Lead Mining District, Lawrence Co., South Dakota, USA

Locality type:Mine
Classification
Species:Cummingtonite
Formula:☐{Mg2}{Mg5}(Si8O22)(OH)2
Confirmation
Validity:Believed Valid
References
References:Am Min (1936), 21:607-610
Associated Minerals Based on Photo Data:
Chlorite Group2 photos of Cummingtonite associated with Chlorite Group at this locality.
Data
Mineral Data:Click here to view Cummingtonite data
Locality Data:Click here to view Homestake Mine, Lead, Lead Mining District, Lawrence Co., South Dakota, USA
Photo GalleryView Gallery (3 photos)
Nearest other occurrences of Cummingtonite
21.9km (13.6 miles) Montana Mine, Rochford Mining District, Lawrence Co., South Dakota, USA
25.0km (15.5 miles) Montezuma Mine (Montezuma Nos. 3 to 7; Red Jim; New Montezuma), Rochford Mining District, Pennington Co., South Dakota, USA
25.7km (16.0 miles) Gold King Mine (Gordelia Mine), Rochford Mining District, Pennington Co., South Dakota, USA
26.1km (16.2 miles) Mary Belle Mine, Rochford Mining District, Pennington Co., South Dakota, USA
26.6km (16.5 miles) Standby mine, Rochford Mining District, Pennington Co., South Dakota, USA
28.7km (17.9 miles) King of the West (North Star), Rochford Mining District, Pennington Co., South Dakota, USA
30.5km (19.0 miles) Golden West Mine (Benedict Property), Rochford Mining District, Pennington Co., South Dakota, USA
31.4km (19.5 miles) Black Eagle Mine (Blair Group), Rochford Mining District, Pennington Co., South Dakota, USA
57.5km (35.8 miles) Black Hills, South Dakota, USA
69.0km (42.9 miles) Newark Group, Unorganized mining district [1], Custer Co., South Dakota, USA
 
Mineral and/or Locality  
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