obsidianite
Americannoun
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Also called helenite. a glassy gemstone made by melting volcanic ash and rock and then rapidly cooling it before it can crystallize: a form of obsidian produced artificially in various colors, including green, red, and blue, as determined by other trace minerals combined with it.
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Rare. a tektite.
Etymology
Origin of obsidianite
First recorded in 1895–1900
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
