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GRANITE |
Quartz rock |
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CHERT |
Quartz rock |
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QUARTZITE |
Massive quartz occurring as a rock; a metamorphosed
sandstone; -- called also quartz rock. |
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FELSITE |
A finegrained rock, flintlike in fracture, consisting
essentially of orthoclase feldspar with occasional grains of quartz. |
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GRANULITE |
A whitish, granular rock, consisting of feldspar and
quartz intimately mixed; -- sometimes called whitestone, and leptynite. |
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REEF |
A large vein of auriferous quartz; -- so called in Australia.
Hence, any body of rock yielding valuable ore. |
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SANDSTONE |
A rock made of sand more or less firmly united. Common
or siliceous sandstone consists mainly of quartz sand. |
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SYENITE |
Orig., a rock composed of quartz, hornblende, and
feldspar, anciently quarried at Syene, in Upper Egypt, and now called
granite. |
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CAIRNGORMSTONE |
A yellow or smoky brown variety of rock crystal, or
crystallized quartz, found esp, in the mountain of Cairngorm, in
Scotland. |
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VEINSTONE |
The nonmetalliferous mineral or rock material which
accompanies the ores in a vein, as quartz, calcite, barite, fluor spar,
etc.; -- called also veinstuff. |
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SCHIST |
... and hornblendic schist, consisting
chiefly of quartz with mica or hornblende and often feldspar. ... |
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PORPHYRY |
... consisting of a fine-grained base (usually feldspathic) through which
crystals, as of feldspar or quartz, are disseminated. There are red,
pu... |
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CRYSTAL |
The material of quartz, in crystallization transparent or
nearly so, and either colorless or slightly tinged with gray, or the
like; -- called ... |
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AMYGDALOID |
...all
cavities, occupied, wholly or in part, by nodules or geodes of
different minerals, esp. agates, quartz, calcite, and the zeolites.
When t... |
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GNEISS |
A crystalline rock, consisting, like granite, of quartz,
feldspar, and mica, but having these materials, especially the mica,
arranged in plane... |