Dictionary.com
Thesaurus.com

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.

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

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

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

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "rock crystal" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com