rock crystal


rock crystal

noun

Definition of ROCK CRYSTAL

:  crystal 1

First Known Use of ROCK CRYSTAL

1666

rock crystal

noun    (Concise Encyclopedia)

Rock crystal from the Dauphiné region of France.—Emil Javorsky/EB Inc.

Transparent variety of the silica mineral quartz that is valued for its clarity and total lack of colour or flaws. Rock crystal formerly was used extensively as a gemstone, but it has been replaced by glass and plastic; rhinestones originally were quartz pebbles found in the Rhine River. The optical properties of rock crystal led to its use in lenses and prisms; its piezoelectric properties (see piezoelectricity) are used to control the oscillation of electrical circuits.

Browse

Next Word in the Dictionary: rock dash
Previous Word in the Dictionary: rockcrusher
All Words Near: rock crystal

Seen & Heard

What made you want to look up rock crystal? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More