OBSIDIANS

Noun

obsidians

plural of obsidian

Source: Wiktionary

OBSIDIAN

Ob*sid"i*an, n. Etym: [L. Obsidianus lapis, so named, according to Pliny, after one Obsidius, who discovered it in Ethiopia: cf.F. obsidiane, obsidienne. The later editions of Pliny read Obsianus lapis, and Obsius, instead of Obsidianus lapis, and Obsidius.] (Min.)

Definition: A kind of glass produced by volcanoes. It is usually of a black color, and opaque, except in thin splinters.

Note: In a thin section it often exhibits a fluidal structure, marked by the arrangement of microlites in the lines of the flow of the molten mass.

Source: Webster’s Unabridged Dictionary 1913 Edition

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