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rock crystal

American  

noun

  1. transparent quartz, especially when colorless.


rock crystal British  

noun

  1. a pure transparent colourless quartz, used in electronic and optical equipment. Formula: SiO 2

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of rock crystal

First recorded in 1660–70

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The movement of thinner magma is also more difficult for seismometers to detect, which makes it harder for scientists to map the system of magma melts, rock, crystal and gas that feed eruptions.

From New York Times ● Dec. 3, 2022

Another clock linked to Queen Victoria's reign is a large organ clock in the King's Drawing Room, which houses a Bible placed by the monarch inside a rock crystal casket.

From BBC ● Oct. 23, 2020

SUN All-ages presentation with rock, crystal and fossil hunter John Cornish, 1 p.m.

From Seattle Times ● Mar. 2, 2017

A luminous chunk of rock crystal sits atop a small plywood box, as if a crystal radio to Frida Kahlo's spirit world.

From Los Angeles Times ● Aug. 14, 2015

At first, all she could think about was how she wouldn’t get to make her own rock crystal stalactites for her Carlsbad Caverns diorama idea.

From "Book Scavenger" by Jennifer Chambliss Bertman

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