ALMOST THERE!. Help us with a final push needed to keep running. Click here to help.
Catawiki are hosting a benefit auction. All proceeds to! BID NOW
Log InRegister
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 Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Pégut (Champs des mines), La Chapelle-sur-Usson, Jumeaux, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

This page is currently not sponsored. Click here to sponsor this page.
Lock Map
Latitude & Longitude (WGS84): 45° 28' 6'' North , 3° 24' 45'' East
Latitude & Longitude (decimal): 45.46833,3.41250
GeoHash:G#: u046ttkbj
Köppen climate type:Cfb : Temperate oceanic climate
Name(s) in local language(s):Pégut (Champs des mines), La Chapelle-sur-Usson, Jumeaux, Puy-de-Dôme, Auvergne, France
Other/historical names associated with this locality:Auvergne; Rhône-Alpes

Quarry and old adits, with several veins.
One of the very rare occurrences of pseudo-cubic amethyst crystals.

Located on private property.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

7 valid minerals.

Detailed Mineral List:

Formula: CaCO3
Reference: Alfred Lacroix - Tome III de La Minéralogie de la France,1901, p. 73
Formula: CaMg(CO3)2
Reference: Jonathan Plasse collection
Formula: PbS
Reference: François Périnet Collection
Formula: Fe2O3
Reference: Alfred Lacroix - Tome III de La Minéralogie de la France,1901, p. 73
Formula: KFe3+ 3(SO4)2(OH)6
Reference: Jonathan and Magalie Plasse Collection
Formula: (Fe,O,OH,H2O)
Reference: Jonathan and Magalie Plasse Collection
Reference: Jonathan and Magalie Plasse Collection
Formula: FeS2
Reference: Jonathan and Magalie Plasse Collection
Formula: SiO2
Habit: SiO2
Colour: shesnut (marron) for the smoky quartz, white for the milky quartz
Reference: Jonathan Plasse collection S. Berger Collection
Quartz var: Amethyst
Formula: SiO2
Habit: SiO2
Colour: Purple
Description: Pseudo-cubic crystallization (89 °/90 °) unique to the world. Numerous phantoms crystals.
Reference: 207433; Jonathan Plasse collection S. Berger Collection
Quartz var: Ferruginous Quartz
Formula: SiO2
Reference: Jonathan and Magalie Plasse Collection
Quartz var: Pseudocubic Quartz
Formula: SiO2
Reference: François Périnet collection
Quartz var: Rock Crystal
Formula: SiO2
Habit: SiO2
Colour: translucide
Reference: Jonathan Plasse collection

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Group 4 - Oxides and Hydroxides
var: Amethyst4.DA.05SiO2
var: Ferruginous Quartz4.DA.05SiO2
var: Pseudocubic Quartz4.DA.05SiO2
var: Rock Crystal4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Jarosite7.BC.10KFe3+ 3(SO4)2(OH)6
Unclassified Minerals, Rocks, etc.

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
AmBnXp, with (m+n):p = 1:2
Jarosite30.2.5.1KFe3+ 3(SO4)2(OH)6
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Rocks, etc.
var: Amethyst
var: Ferruginous Quartz-SiO2
var: Pseudocubic Quartz-SiO2
var: Rock Crystal-SiO2

List of minerals for each chemical element

H JarositeKFe3+ 3(SO4)2(OH)6
H Limonite(Fe,O,OH,H2O)
C CalciteCaCO3
C DolomiteCaMg(CO3)2
O Quartz (var: Amethyst)SiO2
O CalciteCaCO3
O DolomiteCaMg(CO3)2
O Quartz (var: Ferruginous Quartz)SiO2
O HematiteFe2O3
O JarositeKFe3+ 3(SO4)2(OH)6
O Limonite(Fe,O,OH,H2O)
O Quartz (var: Pseudocubic Quartz)SiO2
O QuartzSiO2
O Quartz (var: Rock Crystal)SiO2
Mg DolomiteCaMg(CO3)2
Si Quartz (var: Amethyst)SiO2
Si Quartz (var: Ferruginous Quartz)SiO2
Si Quartz (var: Pseudocubic Quartz)SiO2
Si QuartzSiO2
Si Quartz (var: Rock Crystal)SiO2
S GalenaPbS
S JarositeKFe3+ 3(SO4)2(OH)6
S PyriteFeS2
K JarositeKFe3+ 3(SO4)2(OH)6
Ca CalciteCaCO3
Ca DolomiteCaMg(CO3)2
Fe HematiteFe2O3
Fe JarositeKFe3+ 3(SO4)2(OH)6
Fe Limonite(Fe,O,OH,H2O)
Fe PyriteFeS2
Pb GalenaPbS

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

Late Paleozoic
251.902 - 358.9 Ma

ID: 3191665
Paleozoic intrusive rocks

Age: Phanerozoic (251.902 - 358.9 Ma)

Comments: Massif Central

Lithology: Intrusive igneous rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Paleozoic - Neoproterozoic
251.902 - 1000 Ma

ID: 3135189
Upper Gneiss Unit (Massif Central)

Age: Neoproterozoic to Triassic (251.902 - 1000 Ma)

Description: high grade metamorphic

Lithology: Major:{gneiss}, Minor{amphibolite,migmatite/anatexite}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
AUDIGIER, P., (1894) Histoire d’Auvergne, Mémoire de l’Académie des Sciences, Belles-Lettres et Arts de Clermont Ferrand, (Tome1), pp. 152-154
BARONNE DE BEAUSOLEIL, (1640), in GOBET (1779), Les anciens minéralogistes du royaume de France (première partie), p. 363.
CHERMETTE, A., (1976) L’améthyste d’Auvergne, Rev. Gemm. A. F. G. n°47 pp. 2-5.
DEMARTY, J., (1898) Les pierres d’Auvergne, in Revue d’Auvergne, Tome XV, Clermont-Ferrand, pp. 247-302.
LACROIX, A., (1892) Minéralogie de la France, Tome III, pp. 73-75, Librairie Albert Blanchard.
LE GRAND D’AUSSY, (1788) Voyage d’Auvergne, pp. 247-250
LE MONNIER, in GOBET (1779) Les anciens minéralogistes du royaume de France (seconde partie), pp.524-526.
PERICHAUD, J.-J., (1985) Où trouver les minéraux d’Auvergne (Puy-de-Dôme – Allier), Editions L’Instant Durable, p. 19.
RUDEL, A., (1966) Richesses Minéralogiques en Auvergne, Ed. Volcans (Clermont-Ferrand), pp. 101-111.


Title (click to view)YearAuthor
Exploitation de l’améthyste en Auvergne - Eléments de l’Historique 0François Périnet
Exploitation de l’améthyste en Auvergne - Eléments de l’Historique 0François Périnet
Améthyste et microminéraux associés - Filons du Champ des Mines, Ravin de Pégut - La Chapelle-sur-Usson, Puy-de-Dôme - Collection Jonathan et Magalie Plasse0François Périnet

External Links

This page contains all mineral locality references listed on 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 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.
Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © and the Hudson Institute of Mineralogy 1993-2018, except where stated. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: December 19, 2018 09:41:33 Page generated: September 30, 2018 04:09:00
Go to top of page