Submitted by György Chityil ... on Fri, 01/19/2018 - 23:54 Hierarchy: NounDescription: {{geology}} a natural glass, that is rich in microscopic crystallites, formed by the rapid cooling of lava or magmaNgram: pitchstoneNgram Text: pitchstoneSource: WiktionaryIssue: 0Wiktionary tag: geologyNgram Count: 1
