Vote for your favorite mineral in #MinCup26! - Cuprite vs. Orpiment
It's a fiery match of vibrant red Cuprite and just as saturated orange Orpiment battle for 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

Needle Peak (Sierra Aguja), Brewster County, Texas, USAi
Regional Level Types
Needle Peak (Sierra Aguja)Peak
Brewster CountyCounty
TexasState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearchMineralogy
05442920017272057781782.jpg
Quartz

Needle Peak, Brewster County, Texas, USA
01823790017272057808773.jpg
Chalcedony

Needle Peak, Brewster County, Texas, USA
03346400017366889589690.jpg
Chalcedony

Needle Peak, Brewster County, Texas, USA
07748340017588394167895.jpg
Chalcedony, etc.

Needle Peak, Brewster County, Texas, USA
05442920017272057781782.jpg
Quartz

Needle Peak, Brewster County, Texas, USA
08434720017272057788448.jpg
Chalcedony

Needle Peak, Brewster County, Texas, USA
00402030017272057798473.jpg
Chalcedony

Needle Peak, Brewster County, Texas, USA
05696720017588392877579.jpg
Chalcedony, etc.

Needle Peak, Brewster County, Texas, USA
05442920017272057781782.jpg
Quartz

Needle Peak, Brewster County, Texas, USA
01823790017272057808773.jpg
Chalcedony

Needle Peak, Brewster County, Texas, USA
Latitude & Longitude (WGS84):
29° 13' 36'' North , 103° 38' 24'' West
Latitude & Longitude (decimal):
29.22667,-103.64000
GRN:
N20W65
Type:
Peak
Köppen climate type:
BWh : Hot deserts climate
Nearest Settlements:
PlacePopulationDistance
Study Butte233 (2011)14.7km
Manuel Benavides916 (2014)29.1km
Álamos de San Antonio131 (2013)36.9km
Mindat Locality ID:
27375
Long-form identifier:
mindat:1:2:27375:1
GUID (UUID V4):
0


S. of Terlingua and W of Big Bend National Park boundary.

Known for pom pom agate, thistle agate, and excellent pseudomorphs of chalcedony after aragonite.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


2 valid minerals.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘQuartz
var. Agate		4.00.05SiO2
ⓘvar. Amethyst4.00.05SiO2
ⓘvar. Chalcedony4.00.05SiO2
ⓘ4.00.05SiO2
ⓘvar. Dendritic Agate4.00.05SiO2
ⓘvar. Fortification Agate4.00.05SiO2
Group 5 - Nitrates and Carbonates
ⓘAragonite5.AB.15CaCO3

List of minerals for each chemical element

CCarbon
Cⓘ AragoniteCaCO3
OOxygen
Oⓘ Quartz var. AgateSiO2
Oⓘ Quartz var. AmethystSiO2
Oⓘ AragoniteCaCO3
Oⓘ Quartz var. ChalcedonySiO2
Oⓘ QuartzSiO2
Oⓘ Quartz var. Dendritic AgateSiO2
Oⓘ Quartz var. Fortification AgateSiO2
SiSilicon
Siⓘ Quartz var. AgateSiO2
Siⓘ Quartz var. AmethystSiO2
Siⓘ Quartz var. ChalcedonySiO2
Siⓘ QuartzSiO2
Siⓘ Quartz var. Dendritic AgateSiO2
Siⓘ Quartz var. Fortification AgateSiO2
CaCalcium
Caⓘ AragoniteCaCO3

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.
Quick NavTopMineral ListOther Regions
 
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 5, 2026 05:52:37 Page updated: September 2, 2026 23:21:04
Go to top of page