...But at least he could keep on observing; so he glued hiseyes to the thick quartz window-pane once more... 
Various 「Astounding Stories, August, 1931」
... When drawing near the valley of Ungerengeri, granite knobs and protuberances of dazzling quartz showed their heads above the reddish soil...
Henry M. Stanley 「How I Found Livingstone」
...There is no flint to make celts, but quartz and rocks havinga slaty cleavage are abundant...
David Livingstone 「The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume II (of 2), 1869-1873」
...The latter made very difficult footing indeed, for the entire surface of the ground was covered with smooth, slippery boulders and rocks of iron and quartz...
Stewart Edward White 「African Camp Fires」
...Here is another detail: among the bits of gravel employed for the outercovering of the cupola, grains of quartz predominate...
J. H. Fabre 「The Wonders of Instinct」
...To this day aHottentot priest never uses an iron knife, but always a sharpsplint of quartz, in sacrificing an animal or circumcising a lad...
Sir James George Frazer 「The Golden Bough」
...Two wizards goand remove the stone, which appears to be quartz, and then thenovice is resuscitated...
Sir James George Frazer 「The Golden Bough」
...The shell contained a piece of clear quartz crystal, and the bowl a moss agate...
Edward S. Curtis 「The North American Indian」
...Armlet of quartz crystal used in the formation of the medicinewater of secret orders...
James Stevenson 「Illustrated Catalogue of the Collections Obtained」
...Elora is a town in south-westernHindostan, noted for its splendid cave-temples, cut from a hillof red granite, black basalt, and quartz rock...
Marcius Willson 「Mosaics of Grecian History」
...Had Polter stolen thatmissing fragment of golden quartz the size of a walnut which had beenbeneath Dr...
Various 「Astounding Stories, March, 1931」
...The fragment of quartz lay a foot from them in the center ofthe white surface...
Various 「Astounding Stories, March, 1931」
..."Guard this piece of golden quartz...
Various 「Astounding Stories, March, 1931」
...It was our earth,our heritage down there—and here we were, fleeing for our lives,dispossessed by bits of metal and quartz, machines that we hadfashioned...
Various 「Astounding Stories, July, 1931」
...It is also perfectlytransparent to ultra-violet light,being superior even to rock crystal orfused quartz in that respect...
Various 「Astounding Stories of Super-Science, December 1930」
..."The metal is duranium; it ismetalized quartz...
Various 「Astounding Stories of Super-Science April 1930」
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