: 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
Example Sentences
Recent Examples on the WebThe opal is larger than a brick and is broken into two pieces, which von Brandt said was a practice used decades ago to prove gem quality.chicagotribune.com, 20 Feb. 2022 The opal is larger than a brick and is broken into two pieces, which von Brandt said was a practice used decades ago to prove gem quality.chicagotribune.com, 20 Feb. 2022 The opal is larger than a brick and is broken into two pieces, which von Brandt said was a practice used decades ago to prove gem quality.chicagotribune.com, 20 Feb. 2022 The opal is larger than a brick and is broken into two pieces, which von Brandt said was a practice used decades ago to prove gem quality.chicagotribune.com, 20 Feb. 2022 The opal is larger than a brick and is broken into two pieces, which von Brandt said was a practice used decades ago to prove gem quality.chicagotribune.com, 20 Feb. 2022 The opal is larger than a brick and is broken into two pieces, which von Brandt said was a practice used decades ago to prove gem quality.chicagotribune.com, 20 Feb. 2022 The opal is larger than a brick and is broken into two pieces, which von Brandt said was a practice used decades ago to prove gem quality.chicagotribune.com, 20 Feb. 2022 The opal is larger than a brick and is broken into two pieces, which von Brandt said was a practice used decades ago to prove gem quality.chicagotribune.com, 20 Feb. 2022 See More
Word History
Etymology
Latin opalus, from Greek opallios, ultimately from Sanskrit upala stone, jewel