How much does a 2.00 to 2.99ct D SI2 lab grown round diamond cost?

As of October 2026, 2.00 to 2.99ct D SI2 lab grown round diamonds typically cost £453 GBP to £1,892 GBP, with a median price of £901 GBP. There are currently 48 diamonds matching this specification available across retailers.

Where can I find the best price on a D SI2 round diamond?

About 24% of these diamonds are available at multiple retailers, with an average price spread of 112%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct D SI2 Lab Grown Round

Quick answer

As of October 2026, there are 48 lab grown round diamonds with D colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £453 GBP to £1,892 GBP, with a median of £901 GBP. At least 27 retailers stock this exact specification, and 24% of the stones appear at more than one of them, with an average price spread of 112%. Half of all listings fall between £235 GBP and £625 GBP per carat. The same specification in natural form lists at a median of about £6,638 GBP per carat. Over the last 30 days the median price moved +4.5% and the number of listings moved +17.3%.

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. Round lab grown stones in the index: 414 USD per carat, -5.0% 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

£293 GBP

Highest Price

£2,985 GBP

Average Price

£1,145 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

24.2%

Price Spread

112.0%

30-Day Price Trend

+4.5%

30-Day Supply Change

+17.3%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$463/ct

10th Percentile

$254

Median

$463

90th Percentile

$1,117

Score Distribution

88 diamonds scored across 4 quality tiers

Excellent

11 (12.5%)

Very Good

19 (21.6%)

Good

27 (30.7%)

Average

31 (35.2%)

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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