quartz

Examples of quartz in the following topics:

• Properties of Quartz and Glass

  • Quartz crystals have piezoelectric properties.
  • Pure quartz, traditionally called rock crystal (sometimes called clear quartz), is colorless and transparent or translucent.
  • Common colored varieties include citrine, rose quartz , amethyst, smoky quartz, and milky quartz.
  • Other opaque gemstone varieties of quartz—or mixed rocks including quartz—often include contrasting bands or patterns of color.
  • This diagram shows the crystal structure of quartz.

• Fossil Formation

  • For example, shells that were originally calcite may be replaced by dolomite, quartz, or pyrite.
  • If quartz fossils are surrounded by a calcite matrix, the calcite can be dissolved away by acid, leaving behind an exquisitely preserved quartz fossil.

• Measuring Radiation Exposure

  • There are a number of types of wearable dosimeters: quartz fiber, film badge, thermoluminescent, and solid state.

• Extractive Metallurgy

  • High-grade gold ore from a quartz vein near Alma, Colorado.
  • The appearance is typical of very good gold-quartz ore.

• Great Basin Culture

  • The Uncompahgre Ute are also among the first documented peoples to utilize the effect of mechanoluminescene with quartz crystals to generate light in ceremonies used to call spirits.
  • Special ceremonial rattles were made from buffalo rawhide and filled with clear quartz crystals collected from the mountains of Colorado and Utah.

• Silicate Units, Silicate Chains, Silicate Sheets

  • Examples of such minerals include quartz, zeolites, and feldspars.

• Occurrence of Metals

• Neolithic Monuments

  • The Newgrange monument is comprised of a large mound, built of alternating layers of earth and stones, covered with growing grass, and with flat white quartz stones studded around the circumference.

• Art in the Early Dynastic Period

  • Media ranged from papyrus drawings to pictographs (hieroglyphics) and include funerary sculpture carved in relief and in the round from sandstone, quartz diorite, and granite.

• Islamic Glass Making

  • These and other glass pieces probably represented cheaper versions of vessels of carved rock crystal (clear quartz)—themselves influenced by earlier glass vessels—and there is some evidence that at this period glass and hardstone cutting were regarded as the same craft.