How much does a 2.00 to 2.99ct G SI1 lab grown radiant diamond cost?

As of October 2026, 2.00 to 2.99ct G SI1 lab grown radiant diamonds typically cost £490 GBP to £3,936 GBP, with a median price of £913 GBP. There are currently 104 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI1 radiant diamond?

About 28% of these diamonds are available at multiple retailers, with an average price spread of 229%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct G SI1 Lab Grown Radiant

Quick answer

As of October 2026, there are 104 lab grown radiant diamonds with G colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £490 GBP to £3,936 GBP, with a median of £913 GBP. At least 32 retailers stock this exact specification, and 28% of the stones appear at more than one of them, with an average price spread of 229%. Half of all listings fall between £259 GBP and £1,410 GBP per carat. The same specification in natural form lists at a median of about £7,464 GBP per carat. Over the last 30 days the median price moved -4.7% and the number of listings moved +15.9%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Radiant lab grown stones in the index: 474 USD per carat, -2.1% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: October 2026

Available

104

Lowest Price

£173 GBP

Highest Price

£8,085 GBP

Average Price

£1,493 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

27.7%

Price Spread

229.0%

30-Day Price Trend

-4.7%

30-Day Supply Change

+15.9%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$669/ct

10th Percentile

$212

Median

$669

90th Percentile

$2,587

Score Distribution

194 diamonds scored across 4 quality tiers

Excellent

13 (6.7%)

Very Good

84 (43.3%)

Good

47 (24.2%)

Average

50 (25.8%)

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Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1