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Quartz is a hard,
crystalline mineral composed of
silica (silicon dioxide). The
atoms are
linked in a
continuous framework of SiO4 silicon–oxygen tetrahedra...
- Look up
quartz in Wiktionary, the free dictionary.
Quartz is a
common mineral.
Quartz may also
refer to:
Quartz, California,
former settlement in Butte...
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would bring prosperity.
Quartz and its
varieties have been used as
gemstones for
thousands of years.
Citrine and
other quartzes are
believed to have been...
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Quartz clocks and
quartz watches are
timepieces that use an
electronic oscillator regulated by a
quartz crystal to keep time. This
crystal oscillator...
- The
quartz crisis (Swiss) or
quartz revolution (America, ****an and
other countries) was the
upheaval in the
watchmaking industry caused by the advent...
- The room-temperature form of
quartz, α-
quartz,
undergoes a
reversible change in
crystal structure at 573 °C to form β-
quartz. This
phenomenon is called...
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Fused quartz,
fused silica or
quartz gl**** is a gl****
consisting of
almost pure
silica (silicon dioxide, SiO2) in
amorphous (non-crystalline) form. This...
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Rutilated quartz is a
variety of
quartz which contains acicular (needle-like)
inclusions of rutile. It is used for gemstones.
These inclusions mostly...
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Quartz monzonite is an intrusive, felsic,
igneous rock that has an
approximately equal proportion of
orthoclase and
plagioclase feldspars. It is typically...
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Smoky quartz is a
brownish grey,
translucent variety of
quartz that
ranges in
clarity from
almost complete transparency to an almost-opaque brownish-gray...
