Mineral composed of silicon and oxygen atoms in a continuous framework of SiO₄ silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO₂.
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Colorless glass made of almost pure silica.
1 And in a few seconds the last lumps of quartz had disappeared.
2 Small white line is an intrusion of quartz in the algonkian.............................................. 208
3 The while slab with the golden quartz under the microscope seemed empty.
4 On the top of the hill we found large pebbles of quartz .
5 The plain to the south is covered with quartz and sandstone pebbles.
6 The pick breaks into the hitherto undisturbed quartz ledges of Mariposa gold.
7 Fragments of quartz may be stained by being steeped in green-colored tinctures.
8 They've been prospecting over in the White River and report rich quartz .
9 The Eskimos employ for this purpose pieces of quartz and iron pyrites.
10 Gold is not found alone but contained in quartz rock or sand.
11 There are gold quartz mines of fabulous richness on the Lagunitas grant.
12 He picked up a few pieces of quartz from the canvas sheet.
13 The quartz mines thus give employment to a great number of people.
14 Many of the quartz blocks in the towering light crevices had fallen.
15 The rocks of Ceylon are primitive, consisting of granite, gneiss and quartz .
16 The city dissolved in a shower of ancient glass and splintered quartz .
Другие примеры для термина "quartz"
Grammar, pronunciation and more
Quartz в диалектах
Соединенные Штаты Америки