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

Armstrong property, Shannon Butte, Trinity County, California, USAi
Regional Level Types
Armstrong propertyProperty
Shannon ButteTable/Butte
Trinity CountyCounty
CaliforniaState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Type:
Property
Mindat Locality ID:
211482
Long-form identifier:
mindat:1:2:211482:1
GUID (UUID V4):
0


A Mn property.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

7 valid minerals.

Detailed Mineral List:

ⓘ Bementite
Formula: Mn7Si6O15(OH)8
ⓘ Chrysocolla ?
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
ⓘ Hausmannite
Formula: Mn2+Mn3+2O4
ⓘ 'Limonite'
ⓘ Malachite
Formula: Cu2(CO3)(OH)2
ⓘ Neotocite
Formula: (Mn,Fe)SiO3 · H2O (?)
ⓘ 'Psilomelane'
ⓘ Pyrite
Formula: FeS2
ⓘ Rhodochrosite
Formula: MnCO3

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘHausmannite4.BB.10Mn2+Mn3+2O4
Group 5 - Nitrates and Carbonates
ⓘRhodochrosite5.AB.05MnCO3
ⓘMalachite5.BA.10Cu2(CO3)(OH)2
Group 9 - Silicates
ⓘChrysocolla ?9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
ⓘNeotocite9.ED.20(Mn,Fe)SiO3 · H2O (?)
ⓘBementite9.EE.05Mn7Si6O15(OH)8
Unclassified
ⓘ'Limonite'-
ⓘ'Psilomelane'-

List of minerals for each chemical element

HHydrogen
Hⓘ BementiteMn7Si6O15(OH)8
Hⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Hⓘ MalachiteCu2(CO3)(OH)2
Hⓘ Neotocite(Mn,Fe)SiO3 · H2O (?)
CCarbon
Cⓘ MalachiteCu2(CO3)(OH)2
Cⓘ RhodochrositeMnCO3
OOxygen
Oⓘ BementiteMn7Si6O15(OH)8
Oⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Oⓘ HausmanniteMn2+Mn23+O4
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ Neotocite(Mn,Fe)SiO3 · H2O (?)
Oⓘ RhodochrositeMnCO3
AlAluminium
Alⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
SiSilicon
Siⓘ BementiteMn7Si6O15(OH)8
Siⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Siⓘ Neotocite(Mn,Fe)SiO3 · H2O (?)
SSulfur
Sⓘ PyriteFeS2
MnManganese
Mnⓘ BementiteMn7Si6O15(OH)8
Mnⓘ HausmanniteMn2+Mn23+O4
Mnⓘ Neotocite(Mn,Fe)SiO3 · H2O (?)
Mnⓘ RhodochrositeMnCO3
FeIron
Feⓘ Neotocite(Mn,Fe)SiO3 · H2O (?)
Feⓘ PyriteFeS2
CuCopper
Cuⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cuⓘ MalachiteCu2(CO3)(OH)2

Localities in this Region

USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

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

Trask, Parker Davies, Ivan F. Wilson & F.S. Simons (1943), Manganese deposits of California – a summary report: California Division Mines Bulletin 125: 194-206
Trask, Parker Davies (1950) Geologic description of the manganese deposits of California. California Division of Mines Bulletin 152, 378 pp.: 302-337
Murdoch, Joseph; Webb, Robert Wallace (1966) Minerals of California, Centennial Volume (1866-1966) - California Division of Mines and Geology, Bulletin 189. California Division of Mines and Geology. 559 pp.
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
Quick NavTopMineral ListLocalities 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 3, 2026 17:06:22 Page updated: December 31, 2025 19:17:16
Go to top of page