3 Carat marquise lab-grown diamonds

Every 3 carat marquise lab-grown diamond Facet Wire tracks, sorted by live price.

Facet Wire is tracking 48 live 3 carat marquise lab-grown listings right now across 4 retailers: Frank Darling (24), With Clarity (20), Ada Diamonds (3), Ritani (1). Prices run from $1,766 to $9,679, with a median of $3,727 ($1,016 per carat at the median). Data refreshes nightly — last build 2026-10-17.

Cheapest live 3 carat marquise lab-grown listings

Stone	Retailer	Carat	Color	Clarity	Cert	Price	$/ct
IGI 3.02 Carat F-VS1 Ideal Cut Marquise Lab-Grown Diamond	With Clarity	3.02	F	VS1	IGI 826689961	$1,766	$585
IGI 3.08 Carat F-VS1 Ideal Cut Marquise Lab-Grown Diamond	With Clarity	3.08	F	VS1	IGI 839647681	$1,821	$591
IGI 3.06 Carat F-VVS2 Ideal Cut Marquise Lab-Grown Diamond	With Clarity	3.06	F	VVS2	IGI 836603787	$1,868	$610
IGI 3.1 Carat F-VVS2 Ideal Cut Marquise Lab-Grown Diamond	With Clarity	3.10	F	VVS2	IGI 842650067	$1,954	$630
IGI 5.56 Carat F-VVS2 Very-Good Cut Marquise Lab-Grown Diamond	Ritani	5.56	F	VVS2	IGI LG636491133	$1,997	$359
IGI 4.18 Carat F-SI1 Super Ideal Cut Marquise Lab-Grown Diamond	Frank Darling	4.18	F	SI1	IGI LG704536646	$2,071	$495
IGI 3.52 Carat F-VS1 Ideal Cut Marquise Lab-Grown Diamond	With Clarity	3.52	F	VS1	IGI 838635570	$2,173	$617
IGI 3.03 Carat E-VVS2 Ideal Cut Marquise Lab-Grown Diamond	With Clarity	3.03	E	VVS2	IGI 845662745	$2,185	$721
IGI 3.58 Carat F-VVS2 Ideal Cut Marquise Lab-Grown Diamond	With Clarity	3.58	F	VVS2	IGI 807697311	$2,257	$630
IGI 3.58 Carat F-VVS2 Ideal Cut Marquise Lab-Grown Diamond	With Clarity	3.58	F	VVS2	IGI 807697311	$2,257	$630
IGI 3.52 Carat E-VVS2 Ideal Cut Marquise Lab-Grown Diamond	With Clarity	3.52	E	VVS2	IGI 836602484	$2,286	$649
IGI 3.06 Carat E-VVS2 Ideal Cut Marquise Lab-Grown Diamond	With Clarity	3.06	E	VVS2	IGI 838610208	$2,326	$760

Search all 541 tracked listings →

Frequently asked questions

How much does a marquise lab-grown diamond cost?

Across 48 live listings tracked by Facet Wire, marquise lab-grown diamonds run from $1,766 to $9,679, with a median price of $3,727 ($1,016 per carat). The cheapest tracked right now is a 3.02 ct stone at With Clarity for $1,766.

Which retailer is cheapest for marquise 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, Ada Diamonds, Ritani, and the same certified stone often appears at several retailers with a real price gap.

Are marquise diamonds good value?

Marquise stones are priced off live market data here, not list prices. Compare the per-carat column: at the median, marquise lab-grown diamonds run $1,016 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.