Matches in DBpedia 2014 for { ?s ?p USS Quartz (IX-150), a Trefoil-class concrete barge designated an unclassified miscellaneous vessel, was the only ship of the United States Navy to be named for quartz or silicon dioxide (Si02) a hard, vitreous mineral occurring in many varieties and comprising 12% of the earth's crust. Her keel was laid down as MC hull 1330 by Barrett and Hilp, Belair Shipyards, San Francisco, California (T. B7.D1).. }
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- USS_Quartz_(IX-150) comment "USS Quartz (IX-150), a Trefoil-class concrete barge designated an unclassified miscellaneous vessel, was the only ship of the United States Navy to be named for quartz or silicon dioxide (Si02) a hard, vitreous mineral occurring in many varieties and comprising 12% of the earth's crust. Her keel was laid down as MC hull 1330 by Barrett and Hilp, Belair Shipyards, San Francisco, California (T. B7.D1).".