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

As of October 2026, 0.20 to 0.49ct G SI2 natural oval diamonds typically cost £199 GBP to £436 GBP, with a median price of £312 GBP. There are currently 679 diamonds matching this specification available across retailers.

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

About 31% of these diamonds are available at multiple retailers, with an average price spread of 33%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct G SI2 Natural Oval

Quick answer

As of October 2026, there are 679 natural oval diamonds with G colour and SI2 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run £199 GBP to £436 GBP, with a median of £312 GBP. At least 17 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 33%. Half of all listings fall between £767 GBP and £1,074 GBP per carat. The same specification in lab grown form lists at a median of about £507 GBP per carat. Over the last 30 days the median price moved -2.3% and the number of listings moved +9.9%.

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

679

Lowest Price

£61 GBP

Highest Price

£992 GBP

Average Price

£326 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

30.6%

Price Spread

32.7%

30-Day Price Trend

-2.3%

30-Day Supply Change

+9.9%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,248/ct

10th Percentile

$886

Median

$1,248

90th Percentile

$1,701

Score Distribution

1.6K diamonds scored across 4 quality tiers

Excellent

167 (10.4%)

Very Good

569 (35.3%)

Good

366 (22.7%)

Average

508 (31.6%)

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Consider Instead

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

G I1I1 inclusions are not visible without magnification

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Lab-Grown G SI2Same specifications, lab-grown origin

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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