Updated as of June 2026
Cubic Zirconia vs Diamond
| Cubic Zirconia | Diamond | |
|---|---|---|
| Price / carat | $1 to $30 | $1,000 to $15,000 |
| Hardness (Mohs) | 8.25 | 10 |
| Color | Colorless, Multicolor | Colorless, Yellow, Brown, Pink, Blue |
| Treatment | Lab-grown (fully synthetic) | Typically untreated |
The bottom line
Cubic Zirconia and Diamond both make beautiful jewelry. Choose by the look you want first, then weigh hardness against how hard you will wear the piece, and let price settle close calls. Read the full guides for Cubic Zirconia and Diamond.
Frequently asked questions
Is Cubic Zirconia or Diamond more durable?
Diamond is harder (Mohs 10 vs 8.25), so it resists scratches better.
Which is cheaper, Cubic Zirconia or Diamond?
Cubic Zirconia runs about $1 to $30 per carat and Diamond about $1,000 to $15,000 per carat, so Cubic Zirconia is usually the more affordable choice.
Which should I choose?
Pick Cubic Zirconia if you want colorless tones and Diamond if you prefer colorless. Match the stone hardness to how you will wear it and let budget break the tie.