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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:

Surely the brilliant carving was executed with the aid of a magnifying lens, perhaps made from a piece of rock crystal.

From Los Angeles Times Sep. 10, 2025

She was buried with ivory tusks, ostrich eggshell, and a rock crystal dagger.

From BBC Jul. 6, 2023

It held a rock crystal dagger, ivory tusks and other lavish items.

From Seattle Times Jul. 6, 2023

Gilded mirror frames are studded with porcelain fragments, while graceful bronze chandeliers bear lyrical flourishes of plaster, rock crystal, and white marble.

From Architectural Digest May 15, 2015

I hadn't had a freshwater bath in three weeks and was glistening with caked salt like a stick of rock crystal candy.

From "Hole in My Life" by Jack Gantos

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