Vote for your favorite mineral in #MinCup26! - Cuprite vs. Halite
While externally similar shapes, these two minerals are very different inside.
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

Alunogen No. 2 Tunnel, Alum Mountain Mining District (Alum Mining District), Grant County, New Mexico, USAi
Regional Level Types
Alunogen No. 2 TunnelTunnel
Alum Mountain Mining District (Alum Mining District)Mining District
Grant CountyCounty
New MexicoState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
33° 8' 38'' North , 108° 12' 37'' West
Latitude & Longitude (decimal):
Type:
Nearest Settlements:
PlacePopulationDistance
Pinos Altos198 (2011)31.2km
Hanover167 (2011)38.4km
Mimbres667 (2011)38.5km
Arenas Valley1,522 (2011)39.0km
Gila314 (2011)39.5km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Grant County Rolling Stones Gem & Mineral Society, Inc.Silver City, New Mexico42km
Mindat Locality ID:
35322
Long-form identifier:
mindat:1:2:35322:4
GUID (UUID V4):
0


No description has been added for this locality. Can you add one?

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


2 valid minerals.

Detailed Mineral List:

ⓘ Alunogen
Formula: Al2(SO4)3 · 17H2O
References:
ⓘ Halotrichite
Formula: FeAl2(SO4)4 · 22H2O
References:
ⓘ 'Limonite'
References:
ⓘ 'Wad'
References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘAlunogen7.CB.45Al2(SO4)3 · 17H2O
ⓘHalotrichite7.CB.85FeAl2(SO4)4 · 22H2O
Unclassified
ⓘ'Limonite'-
ⓘ'Wad'-

List of minerals for each chemical element

HHydrogen
Hⓘ AlunogenAl2(SO4)3 · 17H2O
Hⓘ HalotrichiteFeAl2(SO4)4 · 22H2O
OOxygen
Oⓘ AlunogenAl2(SO4)3 · 17H2O
Oⓘ HalotrichiteFeAl2(SO4)4 · 22H2O
AlAluminium
Alⓘ AlunogenAl2(SO4)3 · 17H2O
Alⓘ HalotrichiteFeAl2(SO4)4 · 22H2O
SSulfur
Sⓘ AlunogenAl2(SO4)3 · 17H2O
Sⓘ HalotrichiteFeAl2(SO4)4 · 22H2O
FeIron
Feⓘ HalotrichiteFeAl2(SO4)4 · 22H2O

Other Databases

Link to USGS MRDS:10295969

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

 
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 29, 2026 05:24:00 Page updated: August 31, 2025 10:30:57
Go to top of page