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

As of October 2026, 2.00 to 2.99ct H SI1 lab grown radiant diamonds typically cost £473 GBP to £3,651 GBP, with a median price of £979 GBP. There are currently 42 diamonds matching this specification available across retailers.

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

About 29% of these diamonds are available at multiple retailers, with an average price spread of 95%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct H SI1 Lab Grown Radiant

Quick answer

As of October 2026, there are 42 lab grown radiant diamonds with H colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £473 GBP to £3,651 GBP, with a median of £979 GBP. At least 31 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 95%. Half of all listings fall between £337 GBP and £1,365 GBP per carat. The same specification in natural form lists at a median of about £6,261 GBP per carat. Over the last 30 days the median price moved -25.7% and the number of listings moved +18.5%.

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

Lowest Price

£193 GBP

Highest Price

£10,379 GBP

Average Price

£1,509 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

28.6%

Price Spread

94.7%

30-Day Price Trend

-25.7%

30-Day Supply Change

+18.5%

Volatility (30d)

0.11

Price Range

Price per carat distribution across retailers

$1,455/ct

10th Percentile

$273

Median

$1,455

90th Percentile

$2,718

Score Distribution

80 diamonds scored across 4 quality tiers

Excellent

18 (22.5%)

Very Good

27 (33.8%)

Good

20 (25.0%)

Average

15 (18.8%)

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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