: a usually amorphous mineral that is a hydrated silica softer and less dense than quartz and typically with definite and often marked iridescent play of colors and is used especially as a gem

Examples of opal in a Sentence

Recent Examples on the Web
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Elsewhere, Tory Burch found enlightenment in a midcentury Jules Olitski sculpture, and designer Colleen Allen lit a candlestick to photograph through an opal, conjuring ideas of witchcraft. Ari Stark, WWD, 4 Feb. 2025 Moore completed the look with Christian Louboutin shoes and Cartier jewels, including high-jewelry earrings crafted in 18-karat white gold and set with diamonds and opals. Laurie Brookins, The Hollywood Reporter, 5 Jan. 2025 With a finish like mother of pearl or opal, ammonites have been mined, cut and polished into gemstones called ammolite. Roger Catlin, Smithsonian Magazine, 31 Dec. 2024 The collection ups the ante on the brand’s signature hard stone dials, which are no easy feat on their own—Piaget sometimes goes a hundred cuts of malachite, lapis lazuli, tiger’s eye, opal, or coral before arriving at one slice that’s precise enough to set as a dial with a movement behind it. Shannon Adducci, Robb Report, 6 Dec. 2024 See All Example Sentences for opal

Word History

Etymology

Latin opalus, from Greek opallios, ultimately from Sanskrit upala stone, jewel

First Known Use

circa 1586, in the meaning defined above

Time Traveler
The first known use of opal was circa 1586

Browse Nearby Words

Cite this Entry

“Opal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/opal. Accessed 6 Mar. 2025.

Kids Definition

opal

noun
: a mineral with changeable colors that is used as a gem

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