Moissanite or cubic zirconia? Moissanite resists scratches better and has strong rainbow sparkle. Cubic zirconia, often called CZ, usually costs less. Both can look bright and clear. Choose based on how often you will wear the piece, the look you like and your budget.
If you have seen two similar rings at very different prices, check the stone first. A clear stone is not always a diamond, and two lab-created stones need not be the same material.
Moissanite vs cubic zirconia at a glance
On a small screen, swipe across the table to read both columns.
| Detail | Moissanite | Cubic zirconia (CZ) |
|---|---|---|
| Material | Silicon carbide | Zirconium dioxide |
| Source for jewellery | Lab-created | Lab-created |
| Hardness | About 9.25 on the Mohs scale | About 8 to 8.5 on the Mohs scale |
| Scratch resistance | Higher | Lower; more prone to surface wear |
| Sparkle | Strong coloured flashes | Bright sparkle; the light pattern differs |
| Cost | Often higher than CZ | Often the lower-cost option |
| A reason to choose it | You want more scratch resistance for frequent wear | You want to spend less or try a new style |
The material and hardness figures come from GIA. A higher hardness means better resistance to scratches. It does not mean a stone cannot chip. [1] [2]
Which is better for a ring you wear often?
Moissanite has an advantage if scratch resistance matters most. CZ is more prone to surface scratches over time. That does not mean every CZ stone turns dull after a set number of months. Wear, storage and care all make a difference. [2]
Think about where the piece sits. A ring may hit desks, doors and bags through the day. Studs and pendants usually face fewer knocks. For any stone, check that the prongs are secure and the edges are protected.
Look at the metal too. A hard stone does not make a thin band stronger. Ask about the metal, the finish and what repair support is available.
Will they look the same?
Not quite. Moissanite is known for strong flashes of colour, often called fire. CZ also sparkles, but it has a different pattern of light. The cut, size and lighting affect how either stone looks. [1] [2]
Ask to see a short video in normal room light. Compare stones of a similar width. A larger stone under a spotlight can look very different from a small one near a window.
Why does the price differ?
CZ is often the lower-cost stone. But a finished piece includes much more than the gem. The metal, its weight, the setting and the work all add to the price. [2]
A CZ ring in gold may cost more than a moissanite ring in silver. Compare the full details before you judge value. Ask for the price of any size change and read the return terms.
A simple way to choose
- Decide how often you will wear it. For a ring worn most days, put scratch resistance and a secure setting high on your list.
- Set a budget for the whole piece. Include the metal and any changes you need.
- See the stone in more than one light. Choose the sparkle you enjoy, rather than the brightest shop photo.
- Check the name in writing. The product details and invoice should clearly say which stone you are buying.
CZ can make sense for a lower-cost piece or a style you want to try. Moissanite may suit you if you want stronger scratch resistance and enjoy its fire. Neither has to be passed off as diamond to be worth wearing.
See moissanite in Myraé jewellery
Try the First Sparkle Studs for a round stone, or the Heart's Desire Solitaire Ring for a heart shape. Their product pages show current prices and stock.
Our moissanite buying guide explains size, cut and settings. If diamond is also on your list, read Moissanite vs Diamond. You can ask to see a piece on video before choosing.
Questions buyers ask
Are moissanite and CZ lab-grown diamonds?
No. Both are different materials from diamond. A lab-grown diamond is diamond; moissanite and CZ are not. [3]
Is cubic zirconia the same as zircon?
No. Zircon is a different gemstone. The similar names can cause confusion, so check the full stone name before buying. [4]
Does a diamond tester prove that a stone is diamond?
No. Some heat-based testers can read moissanite as diamond. A jeweller needs suitable tools to tell them apart. Do not rely on one tester result as proof. [1]
Which stone is best for a gift?
Start with the style the person wears and your budget. Then compare the stone and setting. If you do not know their ring size, studs or a pendant may be easier to choose.
Sources
- GIA, Gems & Gemology: Synthetic Moissanite. Material, hardness, fire and tester limits.
- GIA: Diamond Alternatives for Engagement Rings. CZ properties, wear and cost.
- GIA: Man-made Diamonds, Questions and Answers. Diamond and look-alike stones.
- GIA Gem Encyclopedia: Zircon. Zircon and CZ are different stones.
Product details are based on Myraé's catalogue. Choosing advice reflects the trade-offs above; it is not a lab test of each item.