...An irregular block of quartz materialized in the bowl and Kelly tossedit to the floor in savage disgust... 
Various 「Astounding Stories, August, 1931」
...The uppermost stratum is always dolomite or bright white quartz...
David Livingstone 「Missionary Travels and Researches in South Africa」
...He has come to me to-daywith—what do you think?—a fragment of gold, in quartz, from theLong Mountain...
Grant Allen 「An African Millionaire」
...—West through open forest; very undulating, and thepath full of angular fragments of quartz...
David Livingstone 「The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume II (of 2), 1869-1873」
...Both rocks are of the oldest granite, much weather-worn and mixed and banded with mica and quartz...
Richard F. Burton 「Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2」
...A ridge of quartz rocks strikes up throughthe sand...
James Richardson 「Narrative of a Mission to Central Africa Performed in the Years 1850-51, Volume 2」
...In a park of monuments Frobenius saw the celebrated forge andhammer: a mighty mass of iron, like a falling drop in shape, and ablock of quartz fashioned like a drum...
W.E.B. Du Bois 「The Negro」
...As a rule the penguins were careful to selectrounded stones for their nests, but these fragmentsof quartz were jagged and uncomfortable, and mostunsuitable for nest building...
George Murray Levick 「Antarctic Penguins」
...When she finds nodules of translucent quartz,she rejects everything else: the building will be all the prettier forthem...
J. H. Fabre 「The Wonders of Instinct」
...If it had been quartz rock...
George Manville Fenn 「Dead Man's Land」
...Two wizards goand remove the stone, which appears to be quartz, and then thenovice is resuscitated...
Sir James George Frazer 「The Golden Bough」
...And the fragment of golden quartz wasgone!...
Various 「Astounding Stories, March, 1931」
...Imust hide the little piece of golden quartz so no harm will come toit...
Various 「Astounding Stories, March, 1931」
...I haf a smelterand my gold quartz I make into ingots, refined to the standard purity...
Various 「Astounding Stories, March, 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」
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