How much does a 2.00 to 2.99ct J SI2 natural marquise diamond cost?

As of October 2026, 2.00 to 2.99ct J SI2 natural marquise diamonds typically cost £4,203 GBP to £17,891 GBP, with a median price of £8,165 GBP. There are currently 160 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI2 marquise diamond?

About 41% of these diamonds are available at multiple retailers, with an average price spread of 53%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct J SI2 Natural Marquise

Quick answer

As of October 2026, there are 160 natural marquise diamonds with J colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £4,203 GBP to £17,891 GBP, with a median of £8,165 GBP. At least 48 retailers stock this exact specification, and 41% of the stones appear at more than one of them, with an average price spread of 53%. Half of all listings fall between £2,667 GBP and £4,635 GBP per carat. Over the last 30 days the median price moved -4.8% and the number of listings moved +34.0%.

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. Marquise natural stones in the index: 2,268 USD per carat, +10.8% 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

160

Lowest Price

£2,429 GBP

Highest Price

£37,734 GBP

Average Price

£9,922 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

41.5%

Price Spread

53.1%

30-Day Price Trend

-4.8%

30-Day Supply Change

+34.0%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$4,971/ct

10th Percentile

$2,616

Median

$4,971

90th Percentile

$7,265

Score Distribution

359 diamonds scored across 4 quality tiers

Excellent

43 (12.0%)

Very Good

98 (27.3%)

Good

96 (26.7%)

Average

122 (34.0%)

Find Your Diamond

Search 160 J SI2 marquise diamonds and compare prices.

Search Diamonds

Consider Instead

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

J I1I1 inclusions are not visible without magnification

Save 6%

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