3 Carat lab-grown diamonds

All 3 carat lab-grown diamonds tracked right now, every shape, every retailer, sorted by price.

Facet Wire is tracking 191 live 3 carat lab-grown listings right now across 7 retailers: Frank Darling (59), With Clarity (53), VRAI (41), MiaDonna (18), Ritani (10), Whiteflash (5), Ada Diamonds (5). Prices run from $1,429 to $31,985, with a median of $4,030 ($1,126 per carat at the median). Data refreshes nightly — last build 2026-10-18.

Most popular / better value

Across these 191 listings, the most common color is D (73 stones), the most common clarity is VVS2 (81 stones).

Better value: F color / VS1 clarity is the cheapest well-stocked spec combination here — 28 listings at a median of $594 per carat.

Cheapest live 3 carat lab-grown listings

Stone	Retailer	Carat	Color	Clarity	Cert	Price	$/ct
IGI 3.01 Carat G-SI1 Very Good Cut Pear Lab-Grown Diamond	Frank Darling	3.01	G	SI1	IGI 567369770	$1,429	$475
3.70 ct I VVS2 Round Cut Loose Diamond	Whiteflash	3.70	I	VVS2	—	$1,471	$398
IGI 3 Carat F-VS1 Excellent Cut Marquise Lab-Grown Diamond	With Clarity	3.00	F	VS1	IGI 771654535	$1,555	$518
IGI 3 Carat F-VS1 Excellent Cut Marquise Lab-Grown Diamond	With Clarity	3.00	F	VS1	IGI 771654535	$1,555	$518
IGI 3.49 Carat H-VVS2 Super Ideal Cut Pear Lab-Grown Diamond	Frank Darling	3.49	H	VVS2	IGI 801625765	$1,573	$451
IGI 3 Carat F-VS1 Excellent Cut Marquise Lab-Grown Diamond	With Clarity	3.00	F	VS1	IGI 771654535	$1,608	$536
IGI 3.33 Carat F-VS1 Excellent Cut Round Lab-Grown Diamond	With Clarity	3.33	F	VS1	IGI 786647533	$1,623	$487
3.02 Carat Round Shaped, Excellent Cut, F Color, VS1 Clarity, IGI Certified Lab Grown Diamond	MiaDonna	3.02	F	VS1	IGI 830613198	$1,627	$539
IGI 3.08 Carat F-VS1 Ideal Cut Round Lab-Grown Diamond	With Clarity	3.08	F	VS1	IGI 831630057	$1,641	$533
IGI 3 Carat F-VS1 Excellent Cut Marquise Lab-Grown Diamond	With Clarity	3.00	F	VS1	IGI 771654535	$1,715	$572
IGI 3.07 Carat F-VVS2 Ideal Cut Pear Lab-Grown Diamond	With Clarity	3.07	F	VVS2	IGI 840666351	$1,718	$560
IGI 3.06 Carat F-VS1 Ideal Cut Pear Lab-Grown Diamond	With Clarity	3.06	F	VS1	IGI 836625785	$1,750	$572

Search all 1997 tracked listings →

Frequently asked questions

How much does a 3 carat lab-grown diamond cost?

Across 191 live listings tracked by Facet Wire, 3 carat lab-grown diamonds run from $1,429 to $31,985, with a median price of $4,030 ($1,126 per carat). The cheapest tracked right now is a 3.01 ct stone at Frank Darling for $1,429.

Which retailer is cheapest for 3 carat lab-grown diamonds?

It changes nightly — that is the point of Facet Wire. The table on this page is sorted by live price across Frank Darling, With Clarity, VRAI, MiaDonna, Ritani, Whiteflash, Ada Diamonds, and the same certified stone often appears at several retailers with a real price gap.

Are 3 carat diamonds good value?

3 Carat stones are priced off live market data here, not list prices. Compare the per-carat column: at the median, 3 carat lab-grown diamonds run $1,126 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.