What does CZ mean on jewelry?
CZ means Simulant stone (—). No precious metal
The stone has essentially no resale value. Any worth is in the metal it is set in.
What the mark tells you
Cubic zirconia — a synthetic diamond simulant. Not a diamond and not a lab-grown diamond; a completely different material with different optics.
You may also see it written as cubic zirconia, czs, diamonique, dq. They all mean the same thing.
What CZ is worth by weight
Nothing, as metal. A plated or base-metal piece carries a layer of precious metal measured in microns — far too little to recover — and a refiner will not buy it. Whatever value it has is as a finished piece of jewelry, a brand, or an antique, not as scrap.
Is it worth anything?
The stone has essentially no resale value. Any worth is in the metal it is set in.
Marks often confused with CZ
| Mark | Means | Worth |
|---|---|---|
| MOISSANITE | Simulant stone | No metal value |
| LG | Lab-grown diamond | Lab diamond |
Where to find it
On a ring the mark is almost always inside the band. On a chain or bracelet look at the clasp or the tag beside it; on earrings check the post or the back. Marks are tiny and often worn — a phone camera zoomed all the way in usually reads one better than your eye does.
A stamp is evidence, not proof
Marks wear down, are struck only partially, and are occasionally forged outright. If a piece is valuable enough to matter, have the metal tested rather than relying on the stamp alone. Equally, an absent stamp does not always mean an absent metal: older and handmade jewelry is frequently unmarked.
Found something real? Value it
If the piece is solid metal or holds a stone, see what it is actually worth — both at retail and what you would genuinely be offered for it.
Value my jewelry