How Much Is a 3 Carat Diamond Worth?
Big stone, big range. Here's what drives the price of a 3 carat diamond — and how to get the look for less.
There's no single price for a 3 carat diamond — it can swing dramatically depending on the other three Cs and the type of stone. Here's how the math works.
Why prices vary so much
Carat is only one factor. A 3 carat mined diamond can run into five figures because large, high-quality rough is rare. A 3 carat lab grown diamond of the same grade typically costs 30–50% less — same look, far smaller price.
What moves the price
| Factor | Effect on price |
|---|---|
| Cut quality | Big impact — better cut, higher price & sparkle. |
| Color & clarity | Higher grades cost more. |
| Mined vs lab | Lab is dramatically more affordable. |
| Stone type | Moissanite is the most affordable of all. |
Want that 3 carat look for a fraction of the cost? A 3 carat moissanite delivers the same impressive size and dazzling sparkle for a tiny share of a mined diamond's price — which is why big-carat moissanite is so popular.
Not sure how 3 carats looks? See our Carat guide.
FAQs
Why is a 3 carat mined diamond so expensive?
Large, high-quality natural rough is rare, and price rises steeply with size.
Is a 3 carat moissanite a good idea?
If you love a big, sparkly look on a budget, yes — it's one of the most popular sizes in moissanite.
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