opal

noun

ˈō-pəl 

: 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

In addition to sweet basil, there are many varieties of basil, including Thai, lemon, holy, opal, and spicy globe, and lemon basil, which offer exciting flavor differences. —Sheryl Geerts, Better Homes & Gardens, 9 June 2026

Her necklace was a fine gold chain studded with rare opals and diamonds. —Danielle Parker, CBS News, 5 June 2026

The suite consists of chandelier earrings, two bracelets and a ring containing black opals and natural Australian crystals. —Lisa Gutierrez may 18, Kansas City Star, 18 May 2026

Taylor’s opal jewelry was later sold as part of Christie’s 2011 Collection of Elizabeth Taylor auction, and then sold for a second time by Fox Estate Jewelry via 1stDibs in late 2025. —Skyler Caruso, PEOPLE, 18 May 2026

Word History

Etymology

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

First Known Use

circa 1586, in the meaning defined above

Phrases Containing opal

• fire opal

Rhymes for opal

• copal
• propyl
• isopropyl

Kids Definition

opal

noun

ˈō-pəl 

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