Vote for your favorite mineral in #MinCup26! - Bournonite vs. Vesuvianite
Cogwheels of bournonite are up against colourful vesuvianite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Chromium-bearing Clinochlore from
Knoff Mine (Austin Mine; Ladue property; Federwitz; Knoff Austin; Bald Mountains), Volcanoville, Volcanoville Mining District, El Dorado County, California, USA


Locality type:Mine
Classification
Species:Clinochlore var: Chromium-bearing Clinochlore
Formula:Mg5(Al,Cr)2Si3O10(OH)8
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chromium-bearing Clinochlore data
Locality Data:Click here to view Knoff Mine (Austin Mine; Ladue property; Federwitz; Knoff Austin; Bald Mountains), Volcanoville, Volcanoville Mining District, El Dorado County, California, USA
Data Identifiers
Mindat Occurrence Record ID:676597
Long-form Identifier:1:3:676597:2
GUID (UUID V4):0
Nearest other occurrences of Chromium-bearing Clinochlore
2.9km (1.8 miles) ⓘRuby Consolidated Mine (Green Mine), Volcanoville, Volcanoville Mining District, El Dorado County, California, USA
7.7km (4.8 miles) ⓘBlack Oak Mine [2] (Black Oak deposit; Cassiorina Mine; Cassiorini Mine), Georgetown, Georgetown District, East Segment Mother Lode, El Dorado County, California, USA
14.1km (8.8 miles) ⓘShelley Mine (Wolf Mine; Shelly Mine; Shelley Wolf Mine), Coloma, Coloma Mining District, West Belt, El Dorado County, California, USA
25.6km (15.9 miles) ⓘUnnamed Cr occurrence [8], Snakehead Point, Placer County, California, USA
29.4km (18.3 miles) ⓘNewcastle, Ophir Mining District (Auburn Mining District; Duncan Hill Mining District), Placer County, California, USA
30.7km (19.1 miles) ⓘPilliken Mine (Pillikin Mine; Pillikan Mine; Pilliken Chrome Mine), Flagstaff Hill, Salmon Falls Mining District (Flagstaff Hill area), El Dorado County, California, USA
31.1km (19.3 miles) ⓘFlagstaff Hill occurrences, Flagstaff Hill, Salmon Falls Mining District (Flagstaff Hill area), El Dorado County, California, USA
43.8km (27.2 miles) ⓘBrandon Mine [4], Brandon Corner, Shingle Springs Mining District, West Belt, El Dorado County, California, USA
44.1km (27.4 miles) ⓘRed Ledge Mine, Washington, Washington Mining District (Omega Mining District), Nevada County, California, USA
45.8km (28.4 miles) ⓘLatrobe, Latrobe Mining District, El Dorado County, California, USA
References
Cater, F.W., Jr., G.A. Rynearson & D.H. Dow (1951), Chromite deposits of El Dorado County, California: California Division Mines Bulletin 134, part III, Chapter 4: 162
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 4, 2026 13:57:49
Go to top of page