quartz

     

Quartz (from German Quarz (help·info)) is the most abunant mineral in the Earth's continental crust (although feldspar is more common in the world as a whole). It is made up of a lattice of silica (SiO2) tetrahedra. Quartz has a hardness of 7 on the Mohs scale and a density of 2.65 g/cm³.

Trivia about quartz

  • Use of this mineral became common in watches around 1970, greatly increasing accuracy
  • It's the timepiece mineral seen here
  • Until '39 the clock used to keep Greenwich Mean Time was regulated by one of these crystals
  • This form of silica is the main constituent of sand and flint
  • Citrine, which is cut into gemstones, is a variety of this mineral
  • Granite is composed mainly of feldspar & this transparent crystalline material
  • Flint is a fine-grained variety of this mineral used in crystal-controlled clocks & watches
  • A granular form of this common mineral is used to make sandpaper
  • This common rock is piezoelectric & is used to control the frequencies of radio transmitters
  • Sandstone is made of sand, which is made up mostly of this mineral
  • Many of the gems sold as topaz are actually the citrine variety of this stone
  • Rock on! This, composed of silicon dioxide, is the most abundant mineral in the continental crust
  • Dacite is volcanic rock characterized by the presence of this common form of silicon dioxide
  • Around 1920 plates of this silicon mineral were first used to control radio frequencies
  • 6 letters,score 24:Composed of silicon dioxide, it's the most abundant mineral on Earth's surface
  • Citrine is a yellow variety of this mineral
  • Used in watches, it's the most common piezoelectric crystal

Found pages about quartz

Users that searched for quartz

,