What does zirconia mean?
Zirconia is the common name for zirconium dioxide, a white crystalline compound with exceptional hardness, chemical stability, and resistance to high temperatures. These properties make it valuable in ceramics, dental crowns, laboratory refractories, and specialized components that must withstand heat and wear. In everyday jewelry terminology, zirconia usually means cubic zirconia, a synthetic gemstone created in a controlled crystalline form and valued for its strong brilliance. It is widely used as a lower-cost alternative to diamond, although it differs from diamond in composition and physical properties. The word can therefore refer either to an important industrial ceramic or, more familiarly, to a manufactured gemstone. Despite its modern applications and associations with imitation jewelry, zirconia is not simply a lesser material: in several technical fields, its combination of strength, stability, and relatively low cost makes it especially useful.
nounZirconia is zirconium dioxide (ZrO₂), a white crystalline ceramic material used in products such as dental crowns, laboratory refractories, and high-temperature components. The term also refers to cubic zirconia, a synthetic gemstone made for use in jewelry.
- Zirconium dioxide, a white, heat-resistant crystalline ceramic used in dental restorations, refractories, and other engineering applications.
- Cubic zirconia, a synthetic gemstone used as an affordable alternative to diamond in jewelry.
"The jeweler set a brilliant-cut cubic zirconia in a plain silver ring."
"The manufacturer used zirconia to make a durable dental crown."
"She chose a pair of earrings set with sparkling cubic zirconia."
Usually uncountable when referring to zirconium dioxide as a material; pluralized when referring to individual cubic zirconia stones.
"The jeweler displayed several zirconias under bright lighting."
Cubic zirconia gives jewelry the fire of a diamond without carrying a diamond-sized price tag.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of zirconia
The word zirconia was formed from zircon with the suffix -ia during the late eighteenth century, as chemists developed names for newly identified compounds. Zircon itself came into English through French, ultimately deriving from Persian zargūn, meaning “gold-colored.” The related name zirconium was also formed from zircon and was applied to the metal whose oxide became zirconia.
Related word forms
How zirconia is actually used
In technical contexts, zirconia usually denotes the ceramic material zirconium dioxide. In jewelry, the unqualified word generally refers to cubic zirconia, which is synthetic and should not be confused with naturally occurring zircon.
Easily confused with zirconia
Zircon is a naturally occurring gemstone composed chiefly of zirconium silicate, whereas zirconia is zirconium dioxide; synthetic cubic zirconia is not the mineral zircon.