How much does a 2.00 to 2.99ct J I1 lab grown round diamond cost?

As of September 2026, 2.00 to 2.99ct J I1 lab grown round diamonds typically cost £3,543 GBP to £14,735 GBP, with a median price of £5,538 GBP. There are currently 378 diamonds matching this specification available across retailers.

Where can I find the best price on a J I1 round diamond?

About 7% of these diamonds are available at multiple retailers, with an average price spread of 1%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct J I1 Lab Grown Round

Quick answer

As of September 2026, there are 378 lab grown round diamonds with J colour and I1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £3,543 GBP to £14,735 GBP, with a median of £5,538 GBP. At least 13 retailers stock this exact specification, and 7% of the stones appear at more than one of them, with an average price spread of 1%. Half of all listings fall between £1,731 GBP and £1,754 GBP per carat. The same specification in natural form lists at a median of about £3,694 GBP per carat. Over the last 30 days the median price moved -0.5% and the number of listings moved -14.3%.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Round lab grown stones in the index: 438 USD per carat, -14.1% month on month. See the full index release

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

Last updated: September 2026

Available

378

Lowest Price

£1,407 GBP

Highest Price

£27,141 GBP

Average Price

£7,839 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

7.0%

Price Spread

1.3%

30-Day Price Trend

-0.5%

30-Day Supply Change

-14.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,354/ct

10th Percentile

$1,647

Median

$2,354

90th Percentile

$5,614

Score Distribution

378 diamonds scored across 3 quality tiers

Very Good

10 (2.6%)

Good

254 (67.2%)

Average

114 (30.2%)

Find Your Diamond

Search 378 J I1 round diamonds and compare prices.

Search Diamonds

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