Help|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on Mindat
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralSearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Riddle Mine, Riddle, Riddle District, Douglas Co., Oregon, USA

This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84): 42° 57' North , 123° 22' West
Latitude & Longitude (decimal): 42.95, -123.366666667
Other regions containing this locality:North America

A nickel mine owned by Hanna Mining Co. Produced 8,000 tons Ni in ferronickel (1984); capacity is 8,200 tons/year. Closed in 1987.

Springer(Can. Min., 1974) Compositional and Structural Variations in Garnierite: found the garnierite from Riddle to be a poorly crystalline serpentine and quartz under XRD. It has a composition with Mg 1.82 apfu and Ni 0.98apfu.

Mineral List

1 valid mineral.

This page contains all mineral locality references listed on 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 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.


Mining Annual Review (1985): 326.

Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © and the Hudson Institute of Mineralogy 1993-2017, except where stated. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: September 21, 2017 00:33:44 Page generated: September 20, 2017 00:59:56
Go to top of page