Definitionn. colorless glass made of almost pure silica
Last update: August 7, 2015
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Watches are made using quartz. [Please select]
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The greatest development of quartz reefing is found in Victoria, some of the mines being of great depth. [Please select]
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Every mineralogist knows that the quartz of the St. [Please select]
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--a fragment of gold, in quartz, from the Long Mountain. [Please select]
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The lode, being a layer of quartz, sometimes slopes one way, sometimes another, and is occasionally perpendicular. [Please select]
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The rolls may be made either of granite (more strictly speaking, of quartz diorite) or of polished chilled cast iron. [Please select]
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"I said that I observed an interesting section of conglomerate--water-worn pebbles, I should say--mingled with quartz sand, on the roadside." [Please select]
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I meant to say that I didn't know we had any quartz conglomerate hereabouts. [Please select]
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