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El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia i
Regional Level Types
El Dragón mine Mine (Abandoned)
Porco Municipality Municipality
Antonio Quijarro Province Province
Potosí Department
Bolivia Country

Regional Level Types
El Dragón mine	Mine (Abandoned)
Porco Municipality	Municipality
Antonio Quijarro Province	Province
Potosí	Department
Bolivia	Country

This page kindly sponsored by Dr. Günter Grundmann

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View of the El Dragón mine, in 1988.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia

The Cerro Mojon and the position of the El Dragón mine, in 1988.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia

The position of the El Dragón mine, in 1988.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia

View of the El Dragón mine, in 1988.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia

The Cerro Mojon and the position of the El Dragón mine, in 1988.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia

The position of the El Dragón mine, in 1988.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia

View of the El Dragón mine, in 1988.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia

The Cerro Mojon and the position of the El Dragón mine, in 1988.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia

Latitude & Longitude (WGS84):

19° 49' 14'' South , 65° 55' 0'' West

Latitude & Longitude (decimal):

-19.82083,-65.91667

GRN:

S14W44

Type:

Mine (Abandoned) - last checked 2023

Age:

541 ± 1.0 to 252.17 ± 0.06 Ma

Geologic Time:

Paleozoic

Köppen climate type:

BSk : Cold semi-arid (steppe) climate

Nearest Settlements:

Place	Population	Distance
Potosí	141,251 (2017)	31.4km
Betanzos	4,847 (2013)	56.8km

Mindat Locality ID:

353

Long-form identifier:

mindat:1:2:353:2

GUID (UUID V4):

The ore mineralization at El Dragόn, Province of Antonio Quijarro, in the Andes of Bolivia, is the most spectacular occurrence of Se-bearing minerals on Earth known today. Although volumetrically very minor, a total of 35 selenides and selenium oxysalts have been detected to date.

It is the type locality of 12 new selenium mineral species.

Small hydrothermal veins (to 4 cm thick) cutting Paleozoic sedimentary rocks. The origin of the Se-veins was accomplished by multiple injections of highly oxidized, metal-rich fluids into faults at the interface between black shale and siltstone. Selenides dominate over sulphides. The total production of ore was only a few hundred kilograms.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ Ahlfeldite

ⓘ Alfredopetrovite (TL)

ⓘ Bernardevansite (TL)

ⓘ Berzelianite ?

ⓘ Bornite

ⓘ Calcite

ⓘ Cerromojonite (TL)

ⓘ var. Iron-bearing Dolomite

ⓘ Eldragónite (TL)

ⓘ Eskebornite

ⓘ Esperite

ⓘ Favreauite (TL)

ⓘ Felsőbányaite

ⓘ Franksousaite (TL)

ⓘ Goethite

ⓘ Graphite

ⓘ Grundmannite (TL)

ⓘ Guangyuanite (TL)

ⓘ Gypsum

ⓘ Hansblockite (TL)

ⓘ Nickeltyrrellite (TL)

ⓘ Petermegawite (TL)

ⓘ Quijarroite (TL)

75 valid minerals. 12 (TL) - type locality of valid minerals.

Rock Types Recorded

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ Black shale

ⓘ Shale

ⓘ Siltstone

Detailed Mineral List:

ⓘ Ahlfeldite

Formula: Ni(SeO₃) · 2H₂O

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

Yang, Hexiong; Gu, Xiangping; Scott, Michael M.; Jenkins, Robert A.; Gibbs, Ronald B.; Mcglasson, James A.; Downs, Robert T. (2023) Petermegawite, Al₆(Se⁴⁺O₃)₃[SiO₃(OH)](OH)₉⋅10H₂O, a New Al-Bearing Selenite Mineral, from the El Dragón Mine, Potosí, Bolivia. The Canadian Journal of Mineralogy and Petrology, 61 (5). 987-998 doi:10.3749/2300004

ⓘ Alfredopetrovite (TL)

Formula: Al₂(Se⁴⁺O₃)₃ · 6H₂O

Type Locality:

References:

Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2015) New minerals and nomenclature modifications approved in 2015, CNMNC Newsletter 26. Mineralogical Magazine, 79 (4) 941-947 doi:10.1180/minmag.2015.079.4.05

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Allophane

Formula: (Al₂O₃)(SiO₂)_1.3-2 · 2.5-3H₂O

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Alunite

Formula: KAl₃(SO₄)₂(OH)₆

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

ⓘ Anglesite

Formula: PbSO₄

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

Yang, Hexiong, Gu, Xiangping, McGlasson, James A., Gibbs, Ronald B., Downs, Robert T. (2024) Guangyuanite, Pb₃Cl₃(Se₄₊O₃)(OH), a new lead-chloride-selenite mineral from the El Dragón mine, Potosí, Bolivia. Mineralogical Magazine, 88. 97-104 doi:10.1180/mgm.2023.93

ⓘ 'Apatite'

Formula: Ca₅(PO₄)₃(Cl/F/OH)

References:

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Aragonite

Formula: CaCO₃

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.140-140

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Athabascaite

Formula: Cu₅Se₄

References:

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Baryte

Formula: BaSO₄

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

ⓘ Bellidoite ?

Formula: Cu₂Se

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Simon, Grigore, Kesler, Stephen E., Essene, Eric J. (1997) Phase relations among selenides, tellurides, and oxides; II, Applications to selenide-bearing ore deposits. Economic Geology, 92 (4) 468-484 doi:10.2113/gsecongeo.92.4.468

ⓘ Bernardevansite (TL)

Formula: Al₂(SeO₃)₃ · 6H₂O

Type Locality:

References:

Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 70. European Journal of Mineralogy, 34 (6) 591-601 doi:10.5194/ejm-34-591-2022

Yang, Hexiong, Gu, Xiangping, Jenkins, Robert A., Gibbs, Ronald B., Downs, Robert T. (2023) Bernardevansite, Al₂(Se⁴⁺O₃)₃⋅6H₂O, dimorphous with alfredopetrovite and the Al-analogue of mandarinoite, from the El Dragón mine, Potosí, Bolivia. Mineralogical Magazine, 87 (3) 407-414 doi:10.1180/mgm.2023.7

ⓘ Berzelianite ?

Formula: Cu_2-xSe (x ≈ 0.12)

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.137-137

ⓘ Bornite

Formula: Cu₅FeS₄

References:

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Calcite

Formula: CaCO₃

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

ⓘ Cerromojonite (TL)

Formula: CuPbBiSe₃

Type Locality:

References:

Hålenius, Ulf, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2018) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) Newsletter 44. European Journal of Mineralogy, 30 (4) 877-882 doi:10.1127/ejm/2018/0030-2787p.882

Förster, Hans-Jürgen, Bindi, Luca, Grundmann, Günter, Stanley, Chris (2018) Cerromojonite, CuPbBiSe₃, from El Dragόn (Bolivia): A New Member of the Bournonite Group. Minerals, 8 (10) 420 doi:10.3390/min8100420

ⓘ Cerussite

Formula: PbCO₃

References:

ⓘ Chalcocite

Formula: Cu₂S

References:

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Chalcomenite

Formula: CuSeO₃ · 2H₂O

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.141-141

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Clausthalite

Formula: PbSe

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Clinochalcomenite

Formula: CuSeO₃(H₂O)₂

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

ⓘ Cobaltomenite

Formula: CoSeO₃ · 2H₂O

Description: New analysis done in 2021 (SEM, EDAX) by Joy Desor from a specimen in the collection of Elmar Lackner. Analytical data shows a Co:Ni ratio of approx 3:1 confirming Cobaltomenite. Notice the old entry because the similarity to Ahlfieldite: Much of the material called "cobaltomenite" from El Dragon was identified only by XRD and is really pink cobalt-bearing ahlfeldite. Color is a very unreliable guide, as it takes only a minor amount of Co to change the color from green to pink or purple.

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Coronadite

Formula: Pb(Mn⁴⁺₆Mn³⁺₂)O₁₆

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

ⓘ Covellite

Formula: CuS

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Dolomite

Formula: CaMg(CO₃)₂

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Dolomite var. Iron-bearing Dolomite

Formula: Ca(Mg,Fe)(CO₃)₂

References:

Dr Günter Grundmann specimens

ⓘ Eldragónite (TL)

Formula: Cu₆BiSe₄(Se₂)

Type Locality:

References:

Paar, W. H., Cooper, M. A., Moëlo, Y., Stanley, C. J., Putz, H., Topa, D., Roberts, A. C., Stirling, J., Raith, J. G., Rowe, R. (2012) Eldragónite, Cu₆BiSe₄(Se₂), A new mineral species from the El Dragón Mine, Potosí, Bolivia, and its crystal structure. The Canadian Mineralogist, 50 (2). 281-294 doi:10.3749/canmin.50.2.281

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Eskebornite

Formula: CuFeSe₂

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Esperite

Formula: PbCa₂Zn₃(SiO₄)₃

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

ⓘ Favreauite (TL)

Formula: PbBiCu₆O₄(SeO₃)₄(OH) · H₂O

Type Locality:

References:

Mills, Stuart J., Kampf, Anthony R., Christy, Andrew G., Housley, Robert M., Thorne, Brent, Chen, Yu-Sheng, Steele, Ian M. (2014) Favreauite, a new selenite mineral from the El Dragón mine, Bolivia. European Journal of Mineralogy, 26 (6) 771-781 doi:10.1127/ejm/2014/0026-2405

Mills, S.J. (2014) Un hommage à la contribution de Georges FAVREAU à la minéralogie: favreauite, un nouveau minéral de la mine El Dragón, Bolivie. Cahier des Micromonteurs: 124: 36-39.

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Felsőbányaite

Formula: Al₄(SO₄)(OH)₁₀ · 4H₂O

Description: (originally reported as "basaluminite")

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Franksousaite (TL)

Formula: PbCu(Se⁶⁺O₄)(OH)₂

Type Locality:

References:

Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 65. European Journal of Mineralogy, 34 (1) 143-148 doi:10.5194/ejm-34-143-2022

Yang, Hexiong, McGlasson, James A., Gibbs, Ronald B., Downs, Robert T. (2022) Franksousaite, PbCu(Se⁶⁺O₄)(OH)₂, the Se⁶⁺ analogue of linarite, a new mineral from the El Dragón mine, Potosí, Bolivia. Mineralogical Magazine, 86 (5) 792-798 doi:10.1180/mgm.2022.90

ⓘ Goethite

Formula: Fe³⁺O(OH)

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Graphite

Formula: C

References:

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Grundmannite (TL)

Formula: CuBiSe₂

Type Locality:

References:

Förster, Hans-Jürgen, Bindi, Luca, Stanley, Chris J. (2016) Grundmannite, CuBiSe₂, the Se-analogue of emplectite, a new mineral from the El Dragón mine, Potosí, Bolivia. European Journal of Mineralogy, 28 (2) 467-477 doi:10.1127/ejm/2016/0028-2513

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Guangyuanite (TL)

Formula: Pb₃Cl₃(Se⁴⁺O₃)(OH)

Type Locality:

References:

Bosi, Ferdinando, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2023) Newsletter 72. Mineralogical Magazine, 87 (3) 512-518 doi:10.1180/mgm.2023.21

ⓘ Gypsum

Formula: CaSO₄ · 2H₂O

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Hansblockite (TL)

Formula: (Cu,Hg)(Bi,Pb)Se₂

Type Locality:

References:

Hålenius, U., Hatert, F., Pasero, M., Mills, S.J. (2016) New minerals and nomenclature modifications approved in 2016, CNMNC Newsletter no 30. Mineralogical Magazine, 80 (2) 407-413 doi:10.1180/minmag.2016.080.081

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

Förster, Hans-Jürgen; Bindi, Luca; Stanley, Chris J.; Grundmann, Günter (2017) Hansblockite, (Cu,Hg)(Bi,Pb)Se₂, the monoclinic polymorph of grundmannite: a new mineral from the Se mineralization at El Dragón (Bolivia). Mineralogical Magazine, 81 (3). doi:10.1180/minmag.2016.080.115

ⓘ Hematite

Formula: Fe₂O₃

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ 'Kerstenite'

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

ⓘ Klockmannite

Formula: CuSe

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Kruťaite

Formula: CuSe₂

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Lepidocrocite

Formula: Fe³⁺O(OH)

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

ⓘ Linarite

Formula: PbCu(SO₄)(OH)₂

References:

Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068

ⓘ Luxembourgite

Formula: AgCuPbBi₄Se₈

References:

Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68