How much does a 0.20 to 0.49ct J SI2 natural oval diamond cost?

As of October 2026, 0.20 to 0.49ct J SI2 natural oval diamonds typically cost £195 GBP to £484 GBP, with a median price of £312 GBP. There are currently 34 diamonds matching this specification available across retailers.

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

About 50% of these diamonds are available at multiple retailers, with an average price spread of 64%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct J SI2 Natural Oval

Quick answer

As of October 2026, there are 34 natural oval diamonds with J colour and SI2 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run £195 GBP to £484 GBP, with a median of £312 GBP. At least 11 retailers stock this exact specification, and 50% of the stones appear at more than one of them, with an average price spread of 64%. Half of all listings fall between £694 GBP and £1,231 GBP per carat.

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 natural stones in the index: 2,655 USD per carat, +10.2% 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

Lowest Price

£91 GBP

Highest Price

£739 GBP

Average Price

£327 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

50.0%

Price Spread

63.9%

Price Range

Price per carat distribution across retailers

$1,119/ct

10th Percentile

$818

Median

$1,119

90th Percentile

$2,272

Score Distribution

139 diamonds scored across 4 quality tiers

Excellent

6 (4.3%)

Very Good

35 (25.2%)

Good

31 (22.3%)

Average

67 (48.2%)

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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