Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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

Sand and Gravel (commodity) from
Cowell Silver Sand Company, Clayton, Contra Costa County, California, USA


Classification
Commodity:Sand and Gravel (commodity)
Data
Commodity Data:Click here to view Sand and Gravel (commodity) data
Locality Data:Click here to view Cowell Silver Sand Company, Clayton, Contra Costa County, California, USA
Data Identifiers
Mindat Occurrence Record ID:1208909
Long-form Identifier:1:3:1208909:1
GUID (UUID V4):0
Nearest other deposits of Sand and Gravel (commodity)
2.7km (1.7 miles) ⓘPacific Cement and Aggregrates Quarry (Harrison-Birdwell - Pacific Cement and Aggregates Co.), Clayton, Contra Costa County, California, USA
9.2km (5.7 miles) ⓘUnnamed Silica mine [1], Nortonville, Contra Costa County, California, USA
9.6km (6.0 miles) ⓘRoberts Sand Company Mine (Black Diamond Mine), Nortonville, Contra Costa County, California, USA
11.3km (7.0 miles) ⓘPittsburg Sand Company Mine, Somersville, Contra Costa County, California, USA
15.3km (9.5 miles) ⓘAntioch-Marchio prospect, Antioch, Contra Costa County, California, USA
25.6km (15.9 miles) ⓘSilica Company of California Mine, Brentwood, Contra Costa County, California, USA
36.1km (22.5 miles) ⓘBlake Brothers Quarry (San Pablo), Point Richmond (The Point), Richmond, Contra Costa County, California, USA
45.7km (28.4 miles) ⓘGreenbrae Quarry, Greenbrae, Marin County, California, USA
46.4km (28.8 miles) ⓘUnknown Silica prospect [1], Tesla, Livermore Mining District (Tesla District), Alameda County, California, USA
47.9km (29.8 miles) ⓘTesla Sand and Clay Company Mine, Tesla, Livermore Mining District (Tesla District), Alameda County, California, USA
 
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 9, 2026 00:57:31
Go to top of page