...Atthe front end were quartz windows... 
Various 「Astounding Stories, August, 1931」
...An irregular block of quartz materialized in the bowl and Kelly tossedit to the floor in savage disgust...
Various 「Astounding Stories, August, 1931」
...On their tops we have beautiful white quartz rocks, and some have a capping of dolomite...
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」
...Viewed from below, the base rests upon cliffs of gneiss, with debris and quartz in masses, bands and pebbles, pure and impure, white and rusty...
Richard F. Burton 「Two Trips to Gorilla Land and the Cataracts of the Congo 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」
...Its color is light, sometimes white, and the componentpebbles are small and mostly of white quartz...
W. E. Webb 「Buffalo Land」
...And in its center lay afragment of golden quartz the size of a walnut!...
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」
...Like the buildings they had seen, thisalso constructed of opalescent quartz...
Various 「Astounding Stories of Super-Science, December 1930」
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