: 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
The center gem is a large opal, glittering and bright, just like our sun.
—
Jessica Rendall, Space.com, 4 June 2025
The star is its light pink opal, which is surrounded by a string of gold beads.
—Izzy Baskette, People.com, 30 May 2025
Her bold, colorful creations also use Australian opals, and exquisite gemstones including diamonds, sapphires and tanzanites.
—Anthony Demarco, Forbes.com, 11 May 2025
Aran doesn’t recommend this method for emeralds, opals, or any semi-precious stones.
—Aamina Inayat Khan, StyleCaster, 27 Mar. 2025
See All Example Sentences for opal
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Jessica Rendall, Space.com, 4 June 2025
The star is its light pink opal, which is surrounded by a string of gold beads.
—Izzy Baskette, People.com, 30 May 2025
Her bold, colorful creations also use Australian opals, and exquisite gemstones including diamonds, sapphires and tanzanites.
—Anthony Demarco, Forbes.com, 11 May 2025
Aran doesn’t recommend this method for emeralds, opals, or any semi-precious stones.
—Aamina Inayat Khan, StyleCaster, 27 Mar. 2025
See All Example Sentences for opal
Cite this Entry
“Opal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/opal. Accessed 19 Jun. 2025.
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opal
noun
: a mineral with changeable colors that is used as a gem
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