...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」
...Atthe front end were quartz windows...
Various 「Astounding Stories, August, 1931」
... The matrix is rust of iron (or hydrous peroxide of iron and hematite), and in it are imbedded water-worn pebbles of sandstone and quartz...
David Livingstone 「Missionary Travels and Researches in South Africa」
...Some of the sandstone strata are dislocated by a hornblende rock and by basalt, the sandstone nearest to the basalt being converted into quartz...
David Livingstone 「Missionary Travels and Researches in South Africa」
...From the description of the rock I received, I suppose gold is found both in clay shale and quartz...
David Livingstone 「Missionary Travels and Researches in South Africa」
... 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」
...Beyond it the land forms, as in Yoruba, lines of crescents bulging west or seaward, quartz and pebbles showing here and there an old true coast...
Richard F. Burton 「Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2」
...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」
...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」
...The shell contained a piece of clear quartz crystal, and the bowl a moss agate...
Edward S. Curtis 「The North American Indian」
...And the fragment of golden quartz wasgone!...
Various 「Astounding Stories, March, 1931」
...And in its center lay afragment of golden quartz the size of a walnut!...
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」
...The white slab withthe golden quartz under the microscope seemed empty of human movement...
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」
...The fragment ofgolden quartz lies on its clean white slab with a brilliant light uponit...
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」
...A window was in the floor beside him when he awoke—a circular windowof thick glass or quartz...
Various 「Astounding Stories of Super-Science, November, 1930」
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