4 Carat Radiant Cut Lab-Grown Engagement Ring Price
4 carat radiant cut lab-grown engagement ring price
How much is a 4 carat radiant cut lab-grown engagement ring?
Short answer: at Lavora Diamonds, a 4 carat radiant cut lab-grown solitaire (D–E color, VS1+ clarity) in 14K gold is estimated at $3,150–$3,500 complete on our design desk. That covers the IGI-certified center, the setting and your custom 3D render.
Get your price in about 12 hours, then a 3D render in 24–48 hours.
By Lavora Diamonds, Provo, Utah. Updated October 2026.
Our default center is D–E color with VS1+ clarity, quoted on the exact stone you choose.
Two real Lavora radiant builds bracket it: a 3.20ct F VS1 radiant came to $3,047 complete and a 4.50ct F VS1 radiant came to $4,994 complete. Past builds vary with the exact stone and the market when they were made. A hidden halo, pavé band, 18K gold or platinum move the number up, and your exact price comes with your 3D render. Complete engagement rings have a $2,000 minimum.
Lavora radiant cut price guide
| Build | Price | Source |
|---|---|---|
| 4ct radiant · D–E/VS1+ · 14K · solitaire | $3,150–$3,500 | Design-desk estimate |
| 3.0ct radiant · D–E/VS1+ · 14K yellow · solitaire | $2,175–$2,550 | Ring price estimator |
| 3.20ct radiant · F VS1 | $3,047 complete | Completed build |
| 4.50ct radiant · F VS1 | $4,994 complete | Completed build |
| 5ct radiant · D–E/VS1+ · 14K · solitaire | $4,475–$4,950 | Design-desk estimate |
| Hidden halo, pavé band, 18K gold or platinum | Raises the price | Quoted on your specs |
Estimator and design-desk figures are ranges, not fixed prices; completed builds are past Lavora rings. See our ring price estimator and completed ring prices. Your exact price comes with your 3D render.
How big is it?
A radiant is a rectangular brilliant cut with trimmed corners. It has emerald-cut lines with round-style sparkle. Measurements below come from IGI-graded lab-grown stones in our supplier feed, October 2026.
| Center | Face-up size |
|---|---|
| 4ct radiant | about 10.7–11.6 mm long, 7.6–8.1 mm wide |
| 3ct radiant | about 9.8–10.7 mm long, 6.9–7.2 mm wide |
| 4ct round (for comparison) | about 10.2–10.4 mm across |
Radiants carry weight in their depth, so a 4 carat radiant can face up smaller than a 4 carat oval. Compare the millimeters on the IGI report, not just carat weight.
Buying tips
- Clarity: VS1+. Radiant faceting is forgiving of small inclusions, and VS1 is our floor.
- Ratio: radiants range from near-square to clearly elongated; pick the outline you want on your 3D render.
- Depth: two 4 carat radiants can face up differently, so compare the measurements on the IGI report.
- Corners and prongs: the trimmed corners make it a durable rectangular choice; your render shows how the prongs sit. See 5 carat radiant costs for the next size up.
How a custom ring works at Lavora
- Text us a photo or idea. We text back a private soft quote, usually in about 12 hours.
- You see a 3D render first, often within 24–48 hours, for a $50 design fee that is refundable and credited to your ring, with unlimited revisions.
- Delivery takes 4–5 weeks after 3D approval and payment, and a $250 rush takes 2–3 weeks (14–21 days).
- Klarna and Affirm financing are available on your invoice.
Every lab-grown center is IGI-certified, VS1+ clarity. Engraving is complimentary, US shipping is free and fully insured, and every ring comes with a Lifetime craftsmanship warranty, plus free resizing within the first 60 days. The warranty covers manufacturing defects. Save 10 percent off your total when you buy the ring and band together.
Want a real number for your radiant cut? Text us a photo or idea and we text back a private soft quote. No sales call required. Text us any time. We text back your price in about 12 hours.
Text (385) 592-7180 · Price my ring
Complete engagement rings have a $2,000 minimum. Prices shown are estimates; your exact price comes with your 3D render.
Radiant cut questions
How much is a 4 carat radiant cut lab-grown engagement ring?
At Lavora Diamonds, a 4 carat radiant cut lab-grown solitaire (D–E color, VS1+ clarity) in 14K gold is estimated at $3,150–$3,500 complete on our design desk, including the IGI-certified center, setting and your custom 3D render. A completed Lavora 4.50ct F VS1 radiant came to $4,994 complete. Your exact price comes with your 3D render.
Is a radiant cheaper than an oval at 4 carats?
Not on our desk. Our design-desk rates are per carat, not per shape, so a radiant prices like any other shape of the same size and grade on the desk; the exact stone you choose sets the final number. A 4.0ct D–E/VS1+ oval solitaire in 14K yellow gold is also $3,150–$3,500 on our ring price estimator.
How much more is a 5 carat radiant?
Our 14K design-desk estimate for a 5ct D–E/VS1+ radiant solitaire is $4,475–$4,950 complete, compared with $3,150–$3,500 at 4ct.
How big is a 4 carat radiant cut diamond?
Based on IGI-graded 4 carat lab-grown radiants in our supplier feed in October 2026, a 4 carat radiant measures about 10.7–11.6 mm long and 7.6–8.1 mm wide.
Can I get a 4 carat radiant in platinum?
Yes. Platinum and 18K gold are offered and are quoted on your specs; both cost more than the 14K gold in our desk estimate. We show the metal in your 3D render before production.
How do I pay for a custom 4 carat radiant ring?
Production begins after 3D approval and payment. Klarna and Affirm financing are available on your invoice. Complete engagement rings have a $2,000 minimum.
See also: 3 carat radiant prices · 5 carat radiant costs · engagement rings under $5,000 · ring price estimator
Lavora Diamonds · 412 West Rivers Edge Drive, Provo UT 84604 · text (385) 592-7180
See your 3D model in 24–48 hours
Text us a photo or idea and your budget. We reply with a soft quote and next steps. Production begins after 3D approval and payment.
Text (385) 592-7180 Get my ring quote