How much does a 2.00 to 2.99ct J SI1 natural radiant diamond cost?

As of October 2026, 2.00 to 2.99ct J SI1 natural radiant diamonds typically cost £5,280 GBP to £18,619 GBP, with a median price of £7,527 GBP. There are currently 136 diamonds matching this specification available across retailers.

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

About 41% of these diamonds are available at multiple retailers, with an average price spread of 41%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct J SI1 Natural Radiant

Quick answer

As of October 2026, there are 136 natural radiant diamonds with J colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £5,280 GBP to £18,619 GBP, with a median of £7,527 GBP. At least 54 retailers stock this exact specification, and 41% of the stones appear at more than one of them, with an average price spread of 41%. Half of all listings fall between £2,805 GBP and £4,210 GBP per carat. The same specification in lab grown form lists at a median of about £1,311 GBP per carat. Over the last 30 days the median price moved -2.1% and the number of listings moved +29.6%.

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 natural stones in the index: 3,091 USD per carat, +13.2% 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

136

Lowest Price

£3,117 GBP

Highest Price

£31,607 GBP

Average Price

£9,499 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

41.4%

Price Spread

40.9%

30-Day Price Trend

-2.1%

30-Day Supply Change

+29.6%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$4,579/ct

10th Percentile

$3,104

Median

$4,579

90th Percentile

$6,637

Score Distribution

386 diamonds scored across 4 quality tiers

Excellent

48 (12.4%)

Very Good

92 (23.8%)

Good

74 (19.2%)

Average

172 (44.6%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

Lab-Grown J SI1Same specifications, lab-grown origin

Save 62%

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