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Amphibole

7 items
Elongated blue-grey rock specimen with wavy pale green streaks and scattered dark red garnet crystals, on a black background with a 5 cm scale bar.
Blue schist from the Isle of Groix Sophie Graul
Pale green rock specimen packed with long, dark, needle-like crystals in random orientations, on a black background with a 1 cm scale bar.
Blue schist sample from the Isle of Groix with ferroglaucophane Sophie Graul
Rock specimen made mostly of glossy dark blue-black blade-shaped crystals with pale yellow-green patches between them, on a black background with a 1 cm scale bar.
Blue schist sample from the Isle of Groix with ferroglaucophane Sophie Graul
Close-up of a blueschist surface: pale yellowish-green tabular epidote crystals and glassy translucent grains beside a dark blue-black mass, with small rusty brown flecks.
Epidote in blueschist Sophie Graul
Close-up of blueschist: a cluster of fine glassy needle-like crystals and silvery flakes against a dark grey-blue background, beneath a pale greenish-yellow granular layer with brown specks.
Details of blueschists Sophie Graul
Close-up of a dark blue-black rock made of shiny, fibrous crystals in criss-crossing sprays, with scattered pale yellowish-green grains of epidote between them.
Glaucophane and epidotes in Blue schists Sophie Graul
Hand specimen of schist with dark, needle-like hornblende crystals in fan-shaped sprays across a grey and silvery matrix, with pale and rust-brown patches at the edges.
Hornblende schist from Est Tyrol, Austria Sophie Graul

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