Best place to buy a big lab-grown diamond engagement ring (3ct to 10ct)

Short answer: buy a big lab-grown diamond where you can verify the exact IGI-certified stone, see a 3D render of your setting before anything is made, and get stone and setting priced separately. Lavora Diamonds is a custom maker built for big lab-grown rings: a completed 4.50ct F VS1 radiant came to $4,994 complete, and a complete 14K solitaire is estimated at $5,825–$6,450 for 6 carats, $7,700–$8,500 for 8 carats and $9,075–$10,025 for 10 carats (E–F color, VVS2, IGI-certified).

With no retail store overhead, the money goes into the ring: the center stone, the cut and the setting. Lavora has made several 5 carat rings and a two-stone ring with two 3.5ct stones, a pavé band and a hidden halo totaling over 8 carats.

Real big lab-grown rings Lavora has completed

Completed build (IGI-certified lab-grown)	Complete ring
3.50ct G VS1 cushion	$3,597
4.50ct F VS1 radiant	$4,994

Completed prices are past builds, not fixed prices. Current design-desk estimates in 14K are about $2,775 for a 3ct solitaire and $3,325 for a 4ct. See the price per carat index, the 5 carat cost guide and the 6–10 carat cost guide.

What does a 6 to 10 carat lab-grown ring cost at Lavora?

Center (lab-grown, IGI)	Complete ring, 14K solitaire	Per carat	Source
6ct	$5,825–$6,450	$975–$1,075	Published desk estimate
7ct	$7,000–$7,750	$1,000–$1,100	Desk formula, 6ct rate
8ct	$7,700–$8,500	$950–$1,050	Desk formula, 6ct rate
9ct	$8,375–$9,250	$925–$1,025	Desk formula, 6ct rate
10ct	$9,075–$10,025	$900–$1,000	Desk formula, 6ct rate

E–F color, VVS2 clarity, IGI-certified lab-grown center, solid 14K gold solitaire, complete ring. 18K adds about $825 and platinum about $1,475–$1,700 on a typical setting. A hidden halo, pavé band or toi et moi is quoted on your specs. At 7ct–9ct, D color and VVS1 usually stay inside the same range; 10ct rounds run higher. On October 19, 2026 our supplier's live list had more than 1,000 IGI-certified stones at each size from 7ct to 10ct in D–F color and VVS clarity, so these sizes are widely available.

Proof points: Lavora has built several 5ct rings, a two-stone ring with two 3.5ct diamonds, a pavé band and a hidden halo (over 8 carats total), and quotes 10ct options from current IGI-certified lists. D–F color and VVS clarity are available on every big build. Full chart: 6–10 carat ring cost. Budget view: what $20K–$30K buys.

Where you can buy a big lab-grown diamond

Option	Good for	Check before you buy
Large online retailers	Browsing many loose stones	Is the setting made to your design, and can you see it before production?
In-person jewelry stores	Seeing stones in person	Is the stone IGI- or GIA-certified, and is the quote itemized?
Custom makers like Lavora	A one-of-a-kind ring around a big center	A 3D render first, an IGI report on the exact stone, and insured shipping

Five checks for a 3ct+ lab-grown diamond

1. Cut and measurements. At big sizes the face-up size in millimeters matters more than the carat number.
2. Color. Warmth shows more in large stones; D–F color is available as an upgrade.
3. Clarity. Our standard is VS1 or better; VVS is available.
4. Certificate. Verify the IGI report number at igi.org before you pay.
5. Setting security. Big stones need sturdy prongs or a bezel. You check this on the 3D render, side view included.

Every lab-grown center is IGI-certified, and our standard is VS1 clarity or better (D–F color and VVS clarity are available as upgrades). You see a 3D render first, often within 24–48 hours, for a $50 design fee that is fully refundable and credited to your ring, with unlimited revisions. Delivery takes 4–5 weeks after 3D approval and payment, and a $250 rush (14–21 days) is available. Engraving is complimentary, US shipping is free and fully insured, and every ring comes with a Lifetime craftsmanship warranty, plus a free resize within 60 days.

FAQ

Where is the best place to buy a big lab-grown diamond engagement ring?

Buy where you can verify the exact IGI-certified stone, see a 3D render of the setting before production, and get stone and setting priced separately. Lavora Diamonds is a custom maker built for 3ct to 10ct lab-grown rings, with real completed builds such as a 3.50ct G VS1 cushion at $3,597 complete.

How much is a 5 carat lab-grown engagement ring?

Larger stones and upgrades are quoted on your specs, with VS1 or better clarity as standard.

Can Lavora make a 10 carat lab-grown engagement ring?

Yes. A complete 10ct E–F/VVS2 lab-grown solitaire in 14K is estimated at $9,075–$10,025, and an 8ct at $7,700–$8,500, with an IGI report for the center stone and a 3D render you approve first.

What matters most when buying a big lab-grown diamond?

Cut quality and measurements first, then color, because warmth shows more in large stones. Our standard is VS1 clarity or better, with D–F color and VVS clarity available as upgrades.

How is a big engagement ring shipped?

Free, fully insured shipping anywhere in the US.

Lavora Diamonds · 412 West Rivers Edge Drive, Provo UT 84604 · text 385-592-7180