Quartz

(noun.) a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities.

手打:斯蒂芬

• Here and there they were broken with streaks and patches of dusky red, green, and occasional areas of white quartz. 埃德加·赖斯·巴勒斯. 火星战神.
• A loud-speaking telephone with quartz cylinder and beam of ultra-violet light. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• They raced wildly after me until, finally, my foot struck a projecting piece of quartz, and down I went sprawling upon the moss. 埃德加·赖斯·巴勒斯. 火星公主.
• It is commonly found in reefs or veins among quartz, and in alluvial deposits; it is separated, in the former case, by quarrying, crushing, washing and treatment with mercury. 佚名. 神奇的知识之书.
• It looks like quartz crystals sticking up out of the dark hollow. 戴维·赫伯特·劳伦斯. 恋爱中的女人.
• Tunnels through mountain walls, and wells through solid quartz are cut to the depth of thousands of feet. 威廉·亨利·杜利特. 世纪发明.
• In some instances the wood has been converted into solid jasper or has been changed into opal or agate, or filled with chalcedony or crystallized quartz, with beautifully variegated colors. 佚名. 神奇的知识之书.

校对:奥斯瓦德