Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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

Amethyst Mountain, Park County, Wyoming, USAi
Regional Level Types
Amethyst MountainMountain
Park CountyCounty
WyomingState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
06540140017272349759340.jpg
Amethyst

Amethyst Mountain, Park County, Wyoming, USA
06540140017272349759340.jpg
Amethyst

Amethyst Mountain, Park County, Wyoming, USA
06540140017272349759340.jpg
Amethyst

Amethyst Mountain, Park County, Wyoming, USA
Latitude & Longitude (WGS84):
44° 49' 43'' North , 110° 15' 15'' West
Latitude & Longitude (decimal):
44.82861,-110.25417
GeoHash:
G#: 9xcx50g3e
GRN:
N30W57
Type:
Mountain
Köppen climate type:
Dfc : Subarctic climate
Nearest Settlements:
PlacePopulationDistance
Mammoth263 (2011)38.9km
Gardiner875 (2011)42.1km
Mindat Locality ID:
292793
Long-form identifier:
mindat:1:2:292793:3
GUID (UUID V4):
0
Other/historical names associated with this locality:
Yellowstone National Park


Amethyst Mountain is a major peak in Yellowstone National Park and part of a northwest-southeast ridge that lies between the Lamar River to the northeast and Deep Creek to the southwest within Park County, Wyoming. The rocks exposed at the locality are identified as the Eocene Lamar River Formation, itself part of the Absaroka Volcanic Supergroup. Its stated elevation is 2,929 meters (9,609 feet).

The locality was named in 1872 by the United States Geological Survey because amethyst, opal and petrified wood were found in abundance (Gannett, 1905).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


1 valid mineral.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘQuartz
var. Amethyst		4.DA.05SiO2
ⓘvar. Chalcedony4.DA.05SiO2
ⓘ4.DA.05SiO2

List of minerals for each chemical element

OOxygen
Oⓘ Quartz var. AmethystSiO2
Oⓘ Quartz var. ChalcedonySiO2
Oⓘ QuartzSiO2
SiSilicon
Siⓘ Quartz var. AmethystSiO2
Siⓘ Quartz var. ChalcedonySiO2
Siⓘ QuartzSiO2

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

Gannett, H. (1905) The origin of certain place names in the United States. United States Geological Survey, Bulletin 258: p. 23
en.wikipedia.org (n.d.) https://en.wikipedia.org/wiki/Amethyst_Mountain
Quick NavTopMineral ListRock TypesOther 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 6, 2026 09:16:48 Page updated: August 16, 2025 15:04:22
Go to top of page