How much does a 2.00 to 2.99ct J SI1 lab grown oval diamond cost?

As of October 2026, 2.00 to 2.99ct J SI1 lab grown oval diamonds typically cost £858 GBP to £2,898 GBP, with a median price of £1,146 GBP. There are currently 387 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI1 oval diamond?

About 55% of these diamonds are available at multiple retailers, with an average price spread of 54%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct J SI1 Lab Grown Oval

Quick answer

As of October 2026, there are 387 lab grown oval diamonds with J colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £858 GBP to £2,898 GBP, with a median of £1,146 GBP. At least 14 retailers stock this exact specification, and 55% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between £878 GBP and £1,432 GBP per carat. The same specification in natural form lists at a median of about £4,165 GBP per carat. Over the last 30 days the median price moved -0.3% and the number of listings moved -0.4%.

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. Oval lab grown stones in the index: 453 USD per carat, -7.4% 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

387

Lowest Price

£746 GBP

Highest Price

£6,522 GBP

Average Price

£1,741 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

55.2%

Price Spread

54.4%

30-Day Price Trend

-0.3%

30-Day Supply Change

-0.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,364/ct

10th Percentile

$918

Median

$1,364

90th Percentile

$2,129

Score Distribution

652 diamonds scored across 4 quality tiers

Excellent

330 (50.6%)

Very Good

51 (7.8%)

Good

51 (7.8%)

Average

220 (33.7%)

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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