Vote for your favorite mineral in #MinCup26! - Monazite-(Ce) vs. Andalusite
It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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

Central San Benito Mining District, San Benito County, California, USAi
Regional Level Types
Central San Benito Mining DistrictMining District
San Benito CountyCounty
CaliforniaState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearchMineralogy
Latitude & Longitude (WGS84):
36° North , 121° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~61km
GRN:
N25W70
Type:
Mining District
Köppen climate type:
Csb : Warm-summer Mediterranean climate
Mindat Locality ID:
299349
Long-form identifier:
mindat:1:2:299349:5
GUID (UUID V4):
0


A former Hg-Mn mining area around Llanada and the Panoche Valley.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

7 valid minerals.

Rock Types Recorded


Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Alunogen
Formula: Al2(SO4)3 · 17H2O
Colour: Pale yellow
Description: Occurs as nodular crusts on mine tunnel walls.
ⓘ Chalcanthite
Formula: CuSO4 · 5H2O
ⓘ Cinnabar
Formula: HgS
Localities: Reported from at least 10 localities in this region.
ⓘ Deerite
Formula: Fe2+6Fe3+3(Si6O17)O3(OH)5
Description: Occurs in metachert.
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Metacinnabar
Formula: HgS
Description: Only significant ore mineral here.
ⓘ 'Psilomelane'
ⓘ Quartz
Formula: SiO2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘMetacinnabar2.CB.05aHgS
ⓘCinnabar2.CD.15aHgS
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘChalcanthite7.CB.20CuSO4 · 5H2O
ⓘAlunogen7.CB.45Al2(SO4)3 · 17H2O
ⓘGypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
ⓘDeerite9.DH.60Fe2+6Fe3+3(Si6O17)O3(OH)5
Unclassified
ⓘ'Psilomelane'-

List of minerals for each chemical element

HHydrogen
Hⓘ AlunogenAl2(SO4)3 · 17H2O
Hⓘ ChalcanthiteCuSO4 · 5H2O
Hⓘ DeeriteFe62+Fe33+(Si6O17)O3(OH)5
Hⓘ GypsumCaSO4 · 2H2O
OOxygen
Oⓘ AlunogenAl2(SO4)3 · 17H2O
Oⓘ ChalcanthiteCuSO4 · 5H2O
Oⓘ DeeriteFe62+Fe33+(Si6O17)O3(OH)5
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ QuartzSiO2
AlAluminium
Alⓘ AlunogenAl2(SO4)3 · 17H2O
SiSilicon
Siⓘ DeeriteFe62+Fe33+(Si6O17)O3(OH)5
Siⓘ QuartzSiO2
SSulfur
Sⓘ AlunogenAl2(SO4)3 · 17H2O
Sⓘ ChalcanthiteCuSO4 · 5H2O
Sⓘ CinnabarHgS
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ MetacinnabarHgS
CaCalcium
Caⓘ GypsumCaSO4 · 2H2O
FeIron
Feⓘ DeeriteFe62+Fe33+(Si6O17)O3(OH)5
CuCopper
Cuⓘ ChalcanthiteCuSO4 · 5H2O
HgMercury
Hgⓘ CinnabarHgS
Hgⓘ MetacinnabarHgS

Localities in this Region

USA
USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

This page 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

(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Quick NavTopCommoditiesMineral ListRock TypesLocalities in RegionOther RegionsReferences
 
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 7, 2026 06:21:05 Page updated: July 26, 2026 01:47:21
Go to top of page