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
Its acidity can wear down the sealant, dull or etch the surface, damage the resin that binds quartz surfaces, and make the counters more prone to staining.
—
Karen Brewer Grossman, Southern Living, 5 Dec. 2025
Further fieldwork and analysis overturned the impact crater theory, as researchers found no signs of shocked quartz, melted rock, or other telltale traces of a high-energy collision.
—Kenna Hughes-Castleberry, Space.com, 5 Dec. 2025
The shift knob is a quartz crystal shaped into a droplet, containing liquid oil that has been trapped for millions of years – one of those wonderfully eccentric touches only a hyper-rare car like this could get away with.
—New Atlas, 3 Dec. 2025
There are also unique treatments, such as quartz bed therapy—lying on a bed filled with heated quartz—that attempt to harness the valley's electromagnetic properties to relax muscles and balance energy.
—Emma Fritz, Travel + Leisure, 29 Nov. 2025
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Karen Brewer Grossman, Southern Living, 5 Dec. 2025
Further fieldwork and analysis overturned the impact crater theory, as researchers found no signs of shocked quartz, melted rock, or other telltale traces of a high-energy collision.
—Kenna Hughes-Castleberry, Space.com, 5 Dec. 2025
The shift knob is a quartz crystal shaped into a droplet, containing liquid oil that has been trapped for millions of years – one of those wonderfully eccentric touches only a hyper-rare car like this could get away with.
—New Atlas, 3 Dec. 2025
There are also unique treatments, such as quartz bed therapy—lying on a bed filled with heated quartz—that attempt to harness the valley's electromagnetic properties to relax muscles and balance energy.
—Emma Fritz, Travel + Leisure, 29 Nov. 2025
See All Example Sentences for quartz
Cite this Entry
“Quartz.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quartz. Accessed 7 Dec. 2025.
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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