The word quartz is a noun. Quartz means (1) a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities, (2) colorless glass made of almost pure silica.
The following articles and web pages elaborate on the word quartz.
Atomic clocks keep time by means of quartz crystals and periodic radio-controlled synchronization with the NIST atomic clock. Visitors to this website will find comparisons of radio-controlled clocks and watches.
A wall clock can serve as a stylish wall decoration in addition to telling time. Modern wall clocks use quartz movements run by battery power, while traditional wall clocks may rely on weights and pendulums.
The following articles provide recent quartz-related news.
Gold-encrusted quartz from 500 metres below the surface in an area three metres wide and three metres high has delivered rocks weighing up to 90 kilograms, worth millions, in just days.
Jarrod Lucas. Australian Broadcasting Corporation. Monday, 10 Sep 2018 08:10:19 +1000.
During his confirmation hearing for secretary of state, CIA Director Mike Pompeo confirmed he has spoken with Special Counsel Robert Mueller. Quartz White House correspondent Heather Timmons joins CBSN to explain the latest developments.
CBS News. Thursday, 12 Apr 2018 20:05:16 +0000.