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  3. Gabbro

Gabbro

6 items
Polished oval slab of metagabbro, mottled with dark green-black patches and pale greenish-white areas of plagioclase, on a white background.
Metagabbro from the Guil Valley, Queyras, Briançon, Hautes-Alpes, France. Sophie Graul
Thin-section micrograph in polarised light: a cracked turquoise crystal ringed by a radiating rim of multicoloured fibrous crystals, set in large orange and blue grains.
The pretty kind of corona Kristina G Dunkel
Thin-section micrograph of gabbro in vivid colours: large red, orange, blue, olive and yellow crystals enclosing many small grey and white lath-shaped crystals aligned in streaks.
Cooking crystals in the Earth cauldron Julien Leuthold
Mountain summit with a tall red and white striped transmitter mast, a square tower topped by a white dome and a domed building, with visitors and a rock holding a plaque titled Brockenklima.
Brocken (Harz) Wolfgang Fraedrich
Thin-section micrograph in plane-polarised light: a pale, nearly colourless cluster of mineral grains with fine cracks on a cream background, with a 100 micrometre scale bar.
Plagioclases and pyroxens in a gabbro Stéphanie Dalaine
Thin-section micrograph in cross-polarised light: large grey and khaki plagioclase crystals with parallel striped twinning around orange-brown pyroxene grains, with a scale bar.
Plagioclases and pyroxens in a gabbro Stéphanie Dalaine

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