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Etienne Medard's Photo Gallery

CHY-AUCOsumilite-(Mg) KMg2Al3(Al2Si10)O30

01020480014946377866034.jpg
Mont Denise, Espaly-Saint-Marcel, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, France

Field of View: 2 mm

Hexagonal prismatic crystals of osumilite-(Mg) in a vug of a thermometamorphic enclave ("buchite"). G. Pourtier collection, backscattered electron image (SEM) by E. Médard.
Copyright: © Etienne Médard      Photo ID: 778999     Uploaded by: Etienne Medard   View Count: 74   Approval status: Public galleries    Type: Photo - 939 x 707 pixels (0.7 Mpix)

KC7-XWYOsumilite-(Mg) KMg2Al3(Al2Si10)O30

00312310014946377867217.jpg
Mont Denise, Espaly-Saint-Marcel, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, France

Field of View: 3 mm

Deep blue hexagonal Osumilite-(Mg) crystals in a vug from a thermometamorphic enclave ("bucgite"). G. Pourtier collection, photograph by R. Vernet.
Copyright: © Robert Vernet      Photo ID: 778879     Uploaded by: Etienne Medard   View Count: 123   Approval status: Public galleries    Type: Photo - 792 x 510 pixels (0.4 Mpix)

8AA-NUGChayesite K(Mg,Fe2+)4Fe3+[Si12O30]

06422680014947241799825.jpg
Mont Denise, Espaly-Saint-Marcel, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, France

Field of View: 5 mm

Hexagonal chayesite crystals with a coating of tiny hematite crystals. G. Pourtier collection, photograph by R. Vernet
Copyright: © Robert Vernet      Photo ID: 739093     Uploaded by: Etienne Medard   View Count: 109   Approval status: Public galleries    Type: Photo - 782 x 531 pixels (0.4 Mpix)

HY9-1J8Alunite KAl3(SO4)2(OH)6

00258510014946650254449.jpg
Ravin de la Craie, Mont-Dore, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

Field of View: 9.15 mm

Colorless micro-crystals of alunite in a cavity of a silicified trachy-andesite. P. & E. Médard collection, photograph by P. Chollet
Copyright: © Pascal Chollet      Photo ID: 739092     Uploaded by: Etienne Medard   View Count: 86   Approval status: Public galleries    Type: Photo - 2048 x 1334 pixels (2.7 Mpix)

TL7-D81Alunite KAl3(SO4)2(OH)6

07137600014946649458279.jpg
Ravin de la Craie, Mont-Dore, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

Field of View: 9.4 mm

Colorless micro-crystals of alunite in a cavity of a silicified trachy-andesite. P. & E. Médard collection, photograph by P. Chollet
Copyright: © Pascal Chollet      Photo ID: 739091     Uploaded by: Etienne Medard   View Count: 149   Approval status: Public galleries    Type: Photo - 2048 x 1334 pixels (2.7 Mpix)

385-PYDAlunite KAl3(SO4)2(OH)6

09562580014946649457925.jpg
Ravin de la Craie, Mont-Dore, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

Field of View: 4.25 mm

Colorless micro-crystals of alunite in a cavity of a silicified trachy-andesite. P. & E. Médard collection, photograph by P. Chollet
Copyright: © Pascal Chollet      Photo ID: 739090     Uploaded by: Etienne Medard   View Count: 92   Approval status: Public galleries    Type: Photo - 2048 x 1334 pixels (2.7 Mpix)

MJ2-ECXSulphur S8

02247300014947122604223.jpg
Ravin de la Craie, Mont-Dore, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

Field of View: 2.35 mm

Micro-crystal of sulphur in a cavity of a silicified trachy-andesite. P. & E. Médard collection, photograph by P. Chollet
Copyright: © Pascal Chollet      Photo ID: 739088     Uploaded by: Etienne Medard   View Count: 100   Approval status: Public galleries    Type: Photo - 2048 x 1334 pixels (2.7 Mpix)

E3C-88YChayesite K(Mg,Fe2+)4Fe3+[Si12O30]

01583520014949462933228.jpg
Mont Denise, Espaly-Saint-Marcel, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, France

Hexagonal chayesite crystals with a coating of tiny hematite crystals. Field of view is approximately 3 mm. Collection Georges Pourtier, backscattered electron image (SEM) by Etienne Médard / LMV.
Copyright: © Etienne Médard      Photo ID: 445012     Uploaded by: Etienne Medard   View Count: 231   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)

NQ9-KYQChayesite K(Mg,Fe2+)4Fe3+[Si12O30]

09406250014949462928460.jpg
Mont Denise, Espaly-Saint-Marcel, Le Puy-en-Velay, Haute-Loire, Auvergne-Rhône-Alpes, France

Hexagonal chayesite crystal with a coating of tiny hematite crystals. Field of view is approximately 2 mm. Collection Georges Pourtier, backscattered electron image (SEM) by Etienne Médard / LMV.
Copyright: © Etienne Médard      Photo ID: 445011     Uploaded by: Etienne Medard   View Count: 441   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)

TRK-Y38Fluorophlogopite KMg3(AlSi3O10)(F,OH)2 , Hematite Fe2O3 , Enstatite Mg2Si2O6

02398680014947241804111.jpg
Puy de Tunisset, Saint-Ours-les-Roches, Puy-de-Dôme, Auvergne-Rhône-Alpes, France

Very thin transparent plate of fluorophlogopite, with black hematite and orange-brown enstatite. Field of view is about 2.6 mm across. P. & E. Médard collection, photograph by R. Vernet
Copyright: © Robert Vernet      Photo ID: 257769     Uploaded by: Etienne Medard   View Count: 491   Approval status: Public galleries    Type: Photo - 1024 x 678 pixels (0.7 Mpix)
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