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Folsom District, Sacramento Co., California, USA
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The Folsom District extends NW along the S side of the American River, S to Nimbus and W to Mather Air Force Base.

A Au-PGE (Pt-Ir) placer mining area. Pt from this district averages 43.49% Pt. Commonly ferroan platinum alloy and 20.81% Ir.

Mineral List

Mineral list contains entries from the region specified including sub-localities
Chromite
'Clay'
Erlichmanite
Gold
Irarsite
Iridium
var: Osmiridium

var: Ruthenosmiridium
Osmium
Osmium
var: Iridosmine

Platinum
var: Ferroan Platinum
Quartz
var: Rock Crystal

Rutheniridosmine
Sperrylite


14 entries listed. 8 valid minerals.

Localities in this Region

USA
USA

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

Logan, Clarence August (1918), Platinum and allied metals in California: California Mining Bureau. Bulletin 85, 120 pp.: 27-28, 109.

Clark, Wm. B. (1970a) Gold districts of California: California Division Mines & Geology Bulletin 193.

Clark, Wm. B. (1970b) Platinum: California Division Mines and Geology Mineral Information Service: 23: 115-122:

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 43.

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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.
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