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  • Geochemistry, Mineralogy, Petrology & Volcanology (944 entries)
Amphibolite enclaves crossed by two generations of granitic veins
Amphibolite enclaves crossed by two generations of granitic veins by Sophie Graul
Ptygmatic fold crossing a mylonite, within a paragneiss.
Ptygmatic fold crossing a mylonite, within a paragneiss. by Sophie Graul
Close-up of hornblendes crystals in stretched amphibolite enclave
Close-up of hornblendes crystals in stretched amphibolite enclave by Sophie Graul
Example of meta-gabbro/amphibolite enclaves in a granite vein (possible pegmatite texture).
Example of meta-gabbro/amphibolite enclaves in a granite vein (possible pegmatite texture). by Sophie Graul
Detail of K-feldspars pegmatite-like vein on the Kopparnäs coastline, Finland.
Detail of K-feldspars pegmatite-like vein on the Kopparnäs coastline, Finland. by Sophie Graul
Sulphide-bearing gneiss and quartzite from the Estonian Precambrian basement, Alutaguse zone.
Sulphide-bearing gneiss and quartzite from the Estonian Precambrian basement, Alutaguse zone. by Sophie Graul
Microphotograph of a calcite geode found in a glendonite structure
Microphotograph of a calcite geode found in a glendonite structure by Sophie Graul
Hydrothermal fluorite from La Barre, France
Hydrothermal fluorite from La Barre, France by Sophie Graul
Octahedral crystal of fluorite in silica matrix.
Octahedral crystal of fluorite in silica matrix. by Sophie Graul
Hydrothermal fluorite from la Barre former mine, France
Hydrothermal fluorite from la Barre former mine, France by Sophie Graul
Fluorite octahedron from La Barre mine
Fluorite octahedron from La Barre mine by Sophie Graul
Close-up of cubic fluorite crystals
Close-up of cubic fluorite crystals by Sophie Graul
Hornblende schist from Est Tyrol, Austria
Hornblende schist from Est Tyrol, Austria by Sophie Graul
Pyritised shell in Estonian phosphorites
Pyritised shell in Estonian phosphorites by Sophie Graul
Close-up of Hydrothermal fluorite from la Barre former mine, France
Close-up of Hydrothermal fluorite from la Barre former mine, France by Sophie Graul
Hydrothermal fluorite from la Barre former mine, France
Hydrothermal fluorite from la Barre former mine, France by Sophie Graul
Zoned fluorite octahedrons from la Barre, Puy-de-Dôme, France.
Zoned fluorite octahedrons from la Barre, Puy-de-Dôme, France. by Sophie Graul
Zoned fluorite from La Barre former mine, France
Zoned fluorite from La Barre former mine, France by Sophie Graul
The outcrop of G3-granite
The outcrop of G3-granite by Metwally Hamza
Crstalsoulofskulldolom
Crstalsoulofskulldolom by Dursun Acar
Sartorius Craters - Etna Volcano
Sartorius Craters - Etna Volcano by Valeria Belloni
Volcano-Tectonic Interaction
Volcano-Tectonic Interaction by Nicolas Oestreicher
Basaltic flow - Alcantara Gorges
Basaltic flow - Alcantara Gorges by Valeria Belloni
The Magic of Saksun, Føroyar
The Magic of Saksun, Føroyar by Harald Crepaz
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