Cubic zirconia (CZ) is a lab-made crystal of zirconium dioxide that looks like diamond at a tiny fraction of the cost. It is softer than diamond (8–8.5 vs 10 on the Mohs scale) and can cloud over years of wear, but it has strong sparkle, comes in every colour and cut, and lets sterling silver jewelry hit accessible retail prices. That combination is why CZ sells so well. This guide compares CZ with diamond and moissanite and explains what to check when working with a cubic zirconia manufacturer.
Part of our Fashion Jewelry Wholesale Guide
CZ appears across silver jewelry, from small stud earrings to fully paved statement pieces. Deechy Jewelry Manufacturing & Design produces cubic zirconia jewelry in sterling silver for brands and retailers, and here is what matters when buying it.
What Cubic Zirconia Is
Cubic zirconia is a synthetic crystal, not a natural mineral. It is optically similar to diamond, can be cut into any shape, and can be made colourless or in any colour, which makes it ideal for birthstone and colour-led ranges.
CZ vs Diamond vs Moissanite
| Cubic zirconia | Diamond | Moissanite | |
|---|---|---|---|
| Hardness (Mohs) | 8–8.5 | 10 | 9.25 |
| Refractive index | 2.15–2.18 | 2.42 | 2.65–2.69 |
| Fire | Higher than diamond | Moderate | Highest |
| Weight | Heavier than diamond for the same size | Reference | Slightly lighter than diamond |
| Long-term look | Can scratch and cloud over years | Stays clear | Stays clear |
| Relative cost | Lowest | Highest | Mid |
For buyers who want more durability, our guide to wholesale moissanite jewelry covers the step up.
Why CZ in Sterling Silver Sells
- Price range: low stone cost keeps the price driven by silver, labour and plating, so brands can cover gifting and fashion price points.
- Design freedom: any colour, cut and size, including pavé stones that would be very costly in diamond.
- Trend speed: new looks can be added quickly without high stone risk.
- Real metal: paired with sterling silver rather than brass, CZ jewelry feels like fine jewelry at an accessible price.
What Affects CZ Quality
- Cutting: precise facets give a sharp, bright sparkle; poor cutting looks glassy.
- Grade: CZ is sold in commercial grades, and higher grades show better clarity and polish. Grade names are not standardised, so judge samples.
- Setting: stones must sit level and be held securely. See our guide to stone setting.
- Finish: rhodium plating keeps silver bright around the stones.
Selling CZ Honestly
Describe stones as cubic zirconia or CZ, never as diamonds or "diamond-like" in a way that could mislead. Clear labelling protects your brand and keeps you on the right side of advertising rules.
Browse cubic zirconia jewelry, earrings and bridal styles, such as these teardrop CZ stud earrings. Ready-to-ship styles have no minimum order, every piece carries the S925 stamp, and custom versions start from 20–30 pieces per style with a one-time $30 tooling fee.
Frequently Asked Questions
Is cubic zirconia a real gemstone?
It is a lab-made crystal of zirconium dioxide. It is not a natural gem or a diamond, but it is a genuine crystal, not glass.
How long does cubic zirconia last?
CZ is fairly hard (8–8.5 on the Mohs scale) and lasts years with normal care, but it can scratch and lose some brilliance over long daily wear.
What is the difference between CZ and moissanite?
Moissanite is harder, has more fire and stays clear over time; CZ is much cheaper and available in more colours.
How do I choose a cubic zirconia manufacturer?
Compare samples for cutting quality and setting security, check the metal is genuine sterling silver, and confirm plating, minimums and lead times in writing.
Does Deechy make custom CZ jewelry?
Yes. Custom designs start from 20–30 pieces per style with a one-time $30 tooling fee, and ready-to-ship CZ styles have no minimum order.
Part of our Fashion Jewelry Wholesale Guide
