Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon–oxygen tetrahedra...

Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. This crystal oscillator...

Look up quartz in Wiktionary, the free dictionary. Quartz is a common mineral. Quartz may also refer to: Quartz, California, former settlement in Butte...

Smoky quartz is a brownish grey, translucent variety of quartz that ranges in clarity from almost complete transparency to an almost-opaque brownish-gray...

The quartz crisis (Swiss) or quartz revolution (American, Japan and other countries) was the upheaval in the watchmaking industry caused by the advent...

Rutilated quartz is a variety of quartz which contains acicular (needle-like) inclusions of rutile. It is used for gemstones. These inclusions mostly...

comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar, because they are the most resistant minerals to the weathering...

Fused quartz, fused silica or quartz glass is a glass consisting of almost pure silica (silicon dioxide, SiO2) in amorphous (non-crystalline) form. This...

Quartz is an American English language news website owned by G/O Media. Focused on international business news, it was founded in 2012 by Atlantic Media...

element. The oscillator frequency is often used to keep track of time, as in quartz wristwatches, to provide a stable clock signal for digital integrated circuits...