Submitted by György Chityil ... on Fri, 01/19/2018 - 20:30 Hierarchy: NounDescription: {{geology}} Certain dark igneous rocks having grain so fine that the individual crystals cannot be seen with the naked eye.Ngram: aphaniteNgram Text: aphaniteSource: WiktionaryIssue: 0Wiktionary tag: geologyNgram Count: 1