Mindat Logo

Etta Mine, Keystone, Keystone District, Pennington Co., South Dakota, USA
This page is currently not sponsored. Click here to sponsor this page.

Latitude: 43°52'50"N
Longitude: 103°25'8"W
 
 
A lithium-niobium/tantalum-tin muscovite mine in pegmatite. Started in 1883. Owned by the Harney Peak Tin Co. This mine is famous for its huge crystals.

Originally exploited for muscovite in 1883, but acquired by the Harney Peak Tin Mining Company. Tin was never encountered in economic concentrations and the company collapsed by 1893 in "The Black Hills Tin Scandal".

Lithium (spodumene) mining commenced in 1898 and ceased in 1959. Over the years, the mine produced muscovite, niobium, tantalum, beryl and feldspar.

Mineral List

Albite
var: Cleavelandite
'Albite-Anorthite Series'
Alluaudite
Almandine
Amblygonite
Andalusite
Arrojadite-(KFe)
Arsenolite
Arsenopyrite
Augelite
Autunite
Azurite
Baryte ?
Beryl
'Biotite'
Bismuth
Cacoxenite
Cassiterite
Cerussite
Chalcocite
Chalcopyrite
Chrysocolla
Columbite-(Fe)
'Columbite-Tantalite'
Corundum
'Cuprocassiterite'
Diopside
Dufrénite
Elbaite
Epidote
Eucryptite
Ferrisicklerite
Fluorapatite
var: Carbonate-rich Fluorapatite
Frondelite
Galena
Goethite
Gold
Graphite
Griphite
Grossular
Heterosite
Hübnerite
Hureaulite
Ilmenite
Jahnsite-(CaMnMg)
Kaolinite
Kesterite
'K Feldspar
var: Adularia'

Laueite
Lazulite
Lepidolite
Libethenite
Lithiophilite
Löllingite
Ludlamite
Malachite
Microcline
Mitridatite
Molybdenite
Monazite-(Ce)
Montgomeryite
Montmorillonite
Muscovite
Mushistonite
Olivenite
Opal
Orthoclase
Petalite
Phosphosiderite
Pseudomalachite
Pyrite
Quartz
Rockbridgeite
Rutile
var: Strüverite
Scheelite
Schorl
Scorodite
Siderite
Sphalerite
Spinel
Spodumene
Stannite
Stewartite
Strengite
Strunzite
'Tapiolite'
Tavorite
Titanite
Todorokite
Torbernite
Triphylite
Triplite
Uraninite
'Varlamoffite'
Vivianite
'Wolframite'
Xanthoxenite
Zircon


101 entries listed. 90 valid minerals.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Norton, James J. (1964) Pegmatites and other Precambrian Rocks in the Southern Black Hills; Geology and mineral deposits of some pegmatites in the southern Black Hills, South Dakota. USGS Professional Paper 297E.

Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 1088.

Rocks & Minerals: 10: 121-122, 146-147.

Rocks & Minerals: 57: 160.

Rocks & Minerals: 60: 110, 112.

Rocks & Minerals: 75(3): 156-169.

"A History of Black Hills Pegmatites", Matrix Magazine, Volume 10, Number 3, Tom Loomis

External Links


Mineral and/or Locality  
Search Google  
Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: July 22, 2014 15:30:30 Page generated: July 10, 2014 19:06:59
Mineral and Locality Search
Mineral:
and/or Locality:
Options
Fade toolbar when not in focusFix toolbar to bottom of page
Hide Social Media Links
Slideshow frame delay seconds