Acid or granitic glass formed by the rapid cooling of lava without crystallization; usually dark, but transparent in thin pieces.
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"Obsidian" Quotes from Famous Books — History Of Egypt From 330 B.C. To The Present Time, Volume 11 (of 12) • S. Rappoport — The Young Alaskans on the Missouri • Emerson Hough — Daughter of the Sun - A Tale of Adventure • Jackson Gregory |
Words linked to "Obsidian" : volcanic glass |
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