FACETWIREPrice Intelligence3 Carat radiant lab-grown diamonds
Every 3 carat radiant lab-grown diamond Facet Wire tracks, sorted by live price.
Facet Wire is tracking 3 live 3 carat radiant lab-grown listings right now across 1 retailers: MiaDonna (3). Prices run from $2,963 to $31,985, with a median of $8,982 ($847 per carat at the median). Data refreshes nightly — last build 2026-10-20.
Most popular / better value
Across these 3 listings, the most common color is E (1 stones), the most common clarity is VVS2 (3 stones).
Cheapest live 3 carat radiant lab-grown listings
| Stone | Retailer | Carat | Color | Clarity | Cert | Price | $/ct |
|---|---|---|---|---|---|---|---|
| 4.06 Carat Radiant Shaped, Ideal Cut, E Color, VVS2 Clarity, IGI Certified Lab Grown Diamond | MiaDonna | 4.06 | E | VVS2 | IGI LG843625515 | $2,963 | $730 |
| 10.61 Carat Radiant Shaped, Ideal Cut, G Color, VVS2 Clarity, IGI Certified Lab Grown Diamond | MiaDonna | 10.61 | G | VVS2 | IGI 840632526 | $8,982 | $847 |
| 15.02 Carat Radiant Shaped, Very Good Cut, F Color, VVS2 Clarity, IGI Certified Lab Grown Diamond | MiaDonna | 15.02 | F | VVS2 | IGI 717546705 | $31,985 | $2,129 |
Frequently asked questions
How much does a radiant lab-grown diamond cost?
Across 3 live listings tracked by Facet Wire, radiant lab-grown diamonds run from $2,963 to $31,985, with a median price of $8,982 ($847 per carat). The cheapest tracked right now is a 4.06 ct stone at MiaDonna for $2,963.
Which retailer is cheapest for radiant lab-grown diamonds?
It changes nightly — that is the point of Facet Wire. The table on this page is sorted by live price across MiaDonna, and the same certified stone often appears at several retailers with a real price gap.
Are radiant diamonds good value?
Radiant stones are priced off live market data here, not list prices. Compare the per-carat column: at the median, radiant lab-grown diamonds run $847 per carat across our tracked retailers.
How often do these prices update?
Facet Wire re-scrapes its retailers nightly and rebuilds this page from the fresh data, so counts, medians and the cheapest listings reflect the latest run.