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

Prat-Mérien, Persquen, Pontivy, Morbihan, Brittany, Francei
Regional Level Types
Prat-Mérien- not defined -
PersquenCommune
PontivyArrondissement
MorbihanDepartment
BrittanyRegion
FranceCountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
48° North , 3° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~5km
Köppen climate type:
Mindat Locality ID:
64302
Long-form identifier:
mindat:1:2:64302:0
GUID (UUID V4):
0


Quarry located North of Prat-Mérien farm.
Granite with mineralized veins (N10°E) ; mineralization also in arenitized zones (12 meters thick) and in N60°W fractures.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


6 valid minerals.

Detailed Mineral List:

Autunite
Formula: Ca(UO2)2(PO4)2 · 10-12H2O
Description: In granite arenite.
'Gummite'
Description: In granite arenite and in cracks. -Yellow/orange gummite -Black gummite (parapitchblende)
'Gummite var. Coracite'
Description: In granite arenite and in cracks.
'Leucoxene'
Phosphuranylite
Formula: KCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
Pyrite
Formula: FeS2
Description: Big crystals in micaschists and in cracks. Crystals encrusting pitchblende.
Rutile
Formula: TiO2
Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
Uraninite
Formula: UO2
Description: Oxidized pitchblende (U4O9).
Uraninite var. Pitchblende
Formula: UO2
Description: Oxidized pitchblende (U4O9).

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Rutile4.DB.05TiO2
Uraninite
var. Pitchblende
4.DL.05UO2
4.DL.05UO2
Group 8 - Phosphates, Arsenates and Vanadates
Autunite8.EB.05Ca(UO2)2(PO4)2 · 10-12H2O
Torbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Phosphuranylite8.EC.10KCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
Unclassified
'Gummite'-
'Leucoxene'-
'Gummite
var. Coracite'
-

List of minerals for each chemical element

HHydrogen
H AutuniteCa(UO2)2(PO4)2 · 10-12H2O
H PhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
H TorberniteCu(UO2)2(PO4)2 · 12H2O
OOxygen
O AutuniteCa(UO2)2(PO4)2 · 10-12H2O
O PhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
O Uraninite var. PitchblendeUO2
O RutileTiO2
O TorberniteCu(UO2)2(PO4)2 · 12H2O
O UraniniteUO2
PPhosphorus
P AutuniteCa(UO2)2(PO4)2 · 10-12H2O
P PhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
P TorberniteCu(UO2)2(PO4)2 · 12H2O
SSulfur
S PyriteFeS2
KPotassium
K PhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
CaCalcium
Ca AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Ca PhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
TiTitanium
Ti RutileTiO2
FeIron
Fe PyriteFeS2
CuCopper
Cu TorberniteCu(UO2)2(PO4)2 · 12H2O
UUranium
U AutuniteCa(UO2)2(PO4)2 · 10-12H2O
U PhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2O
U Uraninite var. PitchblendeUO2
U TorberniteCu(UO2)2(PO4)2 · 12H2O
U UraniniteUO2

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate
EuropeContinent

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.
 
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 05:35:50 Page updated: August 20, 2025 14:16:43
Go to top of page