Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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

Rosenhahnite from
Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA


09442550017272010987724.jpg
Rosenhahnite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
05346980017272011329968.jpg
Rosenhahnite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
07449200017271926242957.jpg
Rosenhahnite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
02698010017366320447901.jpg
Rosenhahnite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
05399930017866506334995.jpg
Rosenhahnite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
05346980017272011329968.jpg
Rosenhahnite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
06018220017366320445103.jpg
Rosenhahnite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
02698010017366320447901.jpg
Rosenhahnite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
09442550017272010987724.jpg
Rosenhahnite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
05346980017272011329968.jpg
Rosenhahnite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
03568330017271926424604.jpg
Rosenhahnite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
08461390017366320446460.jpg
Rosenhahnite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
Locality type:Occurrence
Classification
Species:Rosenhahnite
Formula:HCa3[Si3O9(OH)]
Comments:Occurs as veins in dark gray boulders.
Confirmation
Validity:Valid - Type Locality
Associated Minerals:
Associates:Pectolite
Xonotlite
Data
Mineral Data:Click here to view Rosenhahnite data
Locality Data:Click here to view Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
Photo GalleryView Gallery (6 photos)
Data Identifiers
Mindat Occurrence Record ID:58507
Long-form Identifier:1:3:58507:9
GUID (UUID V4):0
References
Pabst, A., Gross, E. B., Alfors, J. T. (1967) Rosenhahnite, a new hydrous calcium silicate, from Mendocino County, California. American Mineralogist, 52 (3-4) 336-351
Wan, Che'ng, Ghose, Subrata, Gibbs, G. V. (1977) Rosenhahnite, Ca3Si3O8(OH)2: crystal structure and the stereochemical configuration of the hydroxylated trisilicate group, [Si3O8(OH)2]. American Mineralogist, 62 (5-6) 503-512
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
American Mineralogist (2002): 87: 184.
 
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 3, 2026 14:35:04
Go to top of page