# Cubic zirconia

> Cubic zirconia is a synthetic zirconium oxide (8-8.5 on Mohs), colorless and very inexpensive, used as a diamond simulant.

- Source: https://www.711grados.com/en/cubic-zirconia/
- Language: en
- Note: This entry was drafted with the help of AI and is pending review by the author.
- Published: 2026-06-25
- Updated: 2026-06-25
- Translation (es): https://www.711grados.com/es/circonita-cubica/
- Author: Sandra Sánchez
- Site: 711 Grados (https://www.711grados.com/)

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Cubic zirconia is a synthetic material, a stabilized zirconium oxide, produced in laboratories since the 1970s. It is the most widespread diamond simulant for its look and low price.

## Properties

- **Composition:** zirconium dioxide (ZrO₂), stabilized with yttrium or calcium oxides.
- **Hardness:** between 8 and 8.5 on the Mohs scale.
- **Look:** colorless and very clean; also made in colors.
- **Density:** heavier than diamond: at the same size it weighs more.
- **Origin:** always synthetic.

## Uses in jewelry

- Affordable and fashion jewelry.
- Rings and earrings that imitate diamond.
- Colored stones for quality costume jewelry.

## Pros and cons

### Advantages

- Very inexpensive.
- Clean and brilliant.
- Available in many colors and cuts.

### Limitations

- It scratches with use and loses sparkle over the years.
- It is worth less than diamond or moissanite.
- It clouds with grease and cosmetics.

## Care and cleaning

- Clean often with lukewarm water and mild soap.
- Avoid knocks and abrasives.
- Store it apart from other jewelry.

## See also

- [Moissanite](https://www.711grados.com/en/moissanite/)
- [Lab-grown or natural diamond: differences, price and which to choose](https://www.711grados.com/en/lab-grown-vs-natural-diamonds/)
- [Glass and crystal](https://www.711grados.com/en/glass-and-crystal/)