Spherulitic pitchstone, slide section, Arran, Scotland, UK, brightfield photomicrograph

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Photo credit: © Scenics & Science / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: chemistry, crystalline, divergent, fibres, formations, geology, glassy, igneous, mineralogy, natural, obsidian, pitchstone, rhyolite, rocks, rocks., silica-rich, spherulit, spherulite, thin, vitreous