This page keeps issue 2026-10-02 exactly as it was published. The issue in force is on the price list.

A brand of a given tier carries the benchmark × (1 + its tier's premium), and only once at least one of its product facts has been confirmed by someone independent. Otherwise it carries the benchmark.

Benchmark, round basis

0.30–0.39 ct

	LC	VVS1	VVS2	VS1	VS2	SI1	SI2	P
D	740	720	690	660	640	600	560	460
E	710	680	660	630	610	570	530	440
F	680	650	630	600	580	540	510	420
G	640	620	600	570	550	520	480	400
H	610	590	560	540	520	490	460	380
I	570	550	530	510	490	460	430	350
J	530	510	490	470	450	420	400	330
K	490	470	450	430	420	390	360	300
L	450	430	410	400	380	360	330	280
M	410	390	380	360	350	330	300	250

0.40–0.49 ct

	LC	VVS1	VVS2	VS1	VS2	SI1	SI2	P
D	770	750	720	690	660	620	580	480
E	740	710	690	660	630	590	550	460
F	700	680	650	630	600	570	530	440
G	670	640	620	600	570	540	500	420
H	630	610	590	570	540	510	470	400
I	590	570	550	530	510	470	440	370
J	550	530	510	490	470	440	410	340
K	510	490	470	450	430	410	380	320
L	460	450	430	410	400	370	350	290
M	420	410	390	380	360	340	320	260

0.50–0.69 ct

	LC	VVS1	VVS2	VS1	VS2	SI1	SI2	P
D	810	780	750	720	690	650	610	510
E	770	740	720	690	660	620	580	480
F	740	710	680	660	630	590	550	460
G	700	670	650	620	600	560	520	440
H	660	640	610	590	570	530	500	410
I	620	600	570	550	530	500	460	390
J	570	550	530	510	490	460	430	360
K	530	510	490	470	450	430	400	330
L	490	470	450	430	420	390	360	300
M	440	430	410	390	380	350	330	280

0.70–0.89 ct

	LC	VVS1	VVS2	VS1	VS2	SI1	SI2	P
D	850	820	790	760	730	680	640	530
E	810	780	750	720	690	650	610	510
F	770	740	720	690	660	620	580	480
G	730	710	680	650	630	590	550	460
H	690	670	640	620	590	560	520	430
I	650	620	600	580	560	520	490	400
J	600	580	560	540	520	480	450	380
K	560	540	520	500	480	450	420	350
L	510	490	470	450	440	410	380	320
M	460	450	430	410	400	370	350	290

0.90–0.99 ct

	LC	VVS1	VVS2	VS1	VS2	SI1	SI2	P
D	870	840	810	780	750	700	650	550
E	830	800	770	740	710	670	620	520
F	790	760	740	710	680	640	590	500
G	750	730	700	670	650	610	560	470
H	710	690	660	640	610	570	540	450
I	670	640	620	590	570	540	500	420
J	620	600	570	550	530	500	460	390
K	570	550	530	510	490	460	430	360
L	520	500	490	470	450	420	390	330
M	480	460	440	420	410	380	360	300

1.00–1.49 ct

	LC	VVS1	VVS2	VS1	VS2	SI1	SI2	P
D	910	880	840	810	780	730	680	570
E	870	840	810	770	740	700	650	540
F	830	800	770	740	710	660	620	520
G	780	760	730	700	670	630	590	490
H	740	720	690	660	640	600	560	460
I	690	670	640	620	590	560	520	430
J	640	620	600	580	550	520	480	400
K	590	570	550	530	510	480	450	370
L	550	530	510	490	470	440	410	340
M	500	480	460	440	420	400	370	310

1.50–1.99 ct

	LC	VVS1	VVS2	VS1	VS2	SI1	SI2	P
D	960	930	890	860	820	770	720	600
E	920	880	850	820	790	740	690	570
F	870	840	810	780	750	700	650	550
G	830	800	770	740	710	670	620	520
H	790	760	730	700	670	630	590	490
I	730	710	680	650	630	590	550	460
J	680	660	630	610	580	550	510	430
K	630	610	580	560	540	500	470	390
L	580	560	530	510	490	460	430	360
M	520	500	490	470	450	420	390	330

2.00–2.99 ct

	LC	VVS1	VVS2	VS1	VS2	SI1	SI2	P
D	1,010	980	940	910	870	810	760	630
E	970	930	900	860	830	780	730	610
F	920	890	860	820	790	740	690	580
G	880	840	810	780	750	700	660	550
H	830	800	770	740	710	670	620	520
I	770	750	720	690	660	620	580	480
J	720	690	670	640	620	580	540	450
K	660	640	620	590	570	530	500	410
L	610	590	570	540	520	490	460	380
M	550	530	510	490	470	440	410	350

3.00–3.99 ct

	LC	VVS1	VVS2	VS1	VS2	SI1	SI2	P
D	1,070	1,030	990	960	920	860	800	670
E	1,020	990	950	910	880	820	770	640
F	970	940	900	870	830	780	730	610
G	930	890	860	830	790	740	690	580
H	880	850	810	780	750	700	660	550
I	820	790	760	730	700	660	610	510
J	760	730	710	680	650	610	570	470
K	700	680	650	630	600	560	530	440
L	640	620	600	570	550	520	480	400
M	580	560	540	520	500	470	440	370

4.00–5.00 ct

	LC	VVS1	VVS2	VS1	VS2	SI1	SI2	P
D	1,120	1,080	1,040	1,000	960	900	840	700
E	1,070	1,030	990	950	910	860	800	670
F	1,010	980	940	910	870	820	760	630
G	960	930	890	860	830	770	720	600
H	910	880	850	820	780	730	680	570
I	850	820	790	760	730	680	640	530
J	790	760	730	710	680	640	590	490
K	730	700	680	650	630	590	550	460
L	670	650	620	600	570	540	500	420
M	610	590	570	540	520	490	460	380

Coefficients set by GDCS

Each figure on the list is the benchmark for colour F and clarity VS1 at that carat band, times the colour and clarity coefficients. Cut, shape and growth method then multiply the stone's value. Every coefficient is set by GDCS and reviewed once a year; none is taken from any seller's prices.

Colour

D	E	F	G	H	I	J	K	L	M
× 1.10	× 1.05	× 1.00	× 0.95	× 0.90	× 0.84	× 0.78	× 0.72	× 0.66	× 0.60

Clarity

LC	VVS1	VVS2	VS1	VS2	SI1	SI2	P
× 1.12	× 1.08	× 1.04	× 1.00	× 0.96	× 0.90	× 0.84	× 0.70

Cut

Excellent	Very Good	Good	Fair	Poor
× 1.00	× 0.90	× 0.80	× 0.70	× 0.60

Shape

Round	Cushion	Oval	Radiant	Pear	Heart	Marquise	Square	Emerald
× 1.00	× 0.90	× 0.95	× 0.93	× 0.95	× 0.92	× 0.92	× 0.90	× 0.92

Grown by

HPHT	CVD
× 1.05	× 0.95

Fancy colour at 1.00–1.49 ct, clarity VS1

A fancy-colour stone is priced at the white benchmark of the same carat and clarity at colour F, times its hue and its intensity, with cut taken as Excellent.

	Fancy Light	Fancy	Fancy Intense	Fancy Deep	Fancy Vivid
Yellow	630	670	740	740	810
Pink	630	670	740	740	810
Blue	630	670	740	740	810
Red	630	670	740	740	810
Green	630	670	740	740	810
Brown	440	470	520	520	570

Fancy colour: hue

Yellow	Pink	Blue	Red	Green	Brown
× 1.00	× 1.00	× 1.00	× 1.00	× 1.00	× 0.70

Fancy colour: intensity

Fancy Light	Fancy	Fancy Intense	Fancy Deep	Fancy Vivid
× 0.85	× 0.90	× 1.00	× 1.00	× 1.10

Optical performance (brightness, fire, scintillation) is described on a certificate under GDCS/T—2027 and carries no price.

Sources

Price level: The Diamond Price. (2026). Diamond Price Index [Data set]. CC BY 4.0. Fitted over its 14 lab-grown rows, the 1 ct reference is US$ 715 per carat and price per carat grows with carat to the power 0.158. Coefficients: GDCS, rules v8. The data set file is archived with its date and hash. The price level is fitted to The Diamond Price's Diamond Price Index, used under CC BY 4.0; credit it as well. GDCS adapts it: the rows are fitted to the GDCS formula and none of the data set's own figures is reprinted. How it is calculated.

Lab-Grown Diamond Price List.