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Deutsche Sphärolith {m} [min.] Synonyme

Englische spherulite; spherolite; sphaerolite Synonyme

spherulite Definition

Spherulite
(n.) A minute spherical crystalline body having a radiated structure, observed in some vitreous volcanic rocks, as obsidian and pearlstone.

spherulite Bedeutung

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In petrology, spherulites are small, rounded bodies that commonly occur in vitreous igneous rocks. They are often visible in specimens of obsidian, pitchstone and rhyolite as globules about the size of millet seed or rice grain, with a duller luster than the surrounding glassy base of the rock, and when they are examined with a lens they prove to have a radiate fibrous structure.