1
: a mineral consisting of silicon dioxide occurring in colorless and transparent or colored hexagonal crystals or in crystalline masses
2
: a quartz crystal that when placed in an electric field oscillates at a constant frequency and is used to control devices which require precise regulation
a quartz watch
Examples of quartz in a Sentence
Recent Examples on the Web
No unexposed quartz or second-tier auto-winder here.
—
Allen Farmelo, Robb Report, 12 Apr. 2024
With their distinctive bands and sporadic veins of quartz and feldspar, the stones sparkle whenever sunlight strikes them.
—Dan Falk, Discover Magazine, 6 Apr. 2024
See all Example Sentences for quartz 
Allen Farmelo, Robb Report, 12 Apr. 2024
With their distinctive bands and sporadic veins of quartz and feldspar, the stones sparkle whenever sunlight strikes them.
—Dan Falk, Discover Magazine, 6 Apr. 2024
See all Example Sentences for quartz
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'quartz.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Quartz.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quartz. Accessed 3 May. 2024.
Copy CitationKids Definition
quartz
noun
: a common mineral consisting of silicon dioxide that is often found in the form of colorless transparent crystals but is sometimes (as in amethysts, agates, and jaspers) brightly colored
Medical Definition
quartz
noun
: a mineral SiO2 consisting of a silica that occurs in colorless and transparent or colored hexagonal crystals and also in crystalline masses
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