cubic zirconia

[zur-koh-nee-uh]
noun, plural cu·bic zir·co·ni·as.
  1. an artificial crystal resembling a diamond in refraction, dispersion, hardness, and color, used in jewelry. Abbreviation: CZ
Sometimes cu·bic zir·co·ni·um [zur-koh-nee-uh m] /zɜrˈkoʊ ni əm/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018