How much does a 3.00 to 4.99ct D SI1 natural oval diamond cost?

As of October 2026, 3.00 to 4.99ct D SI1 natural oval diamonds typically cost £29,985 GBP to £66,773 GBP, with a median price of £41,409 GBP. There are currently 199 diamonds matching this specification available across retailers.

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

About 30% of these diamonds are available at multiple retailers, with an average price spread of 26%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct D SI1 Natural Oval

Quick answer

As of October 2026, there are 199 natural oval diamonds with D colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £29,985 GBP to £66,773 GBP, with a median of £41,409 GBP. At least 58 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 26%. Half of all listings fall between £10,869 GBP and £14,089 GBP per carat. The same specification in lab grown form lists at a median of about £280 GBP per carat. Over the last 30 days the median price moved +0.6% and the number of listings moved +7.5%.

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

199

Lowest Price

£17,089 GBP

Highest Price

£110,959 GBP

Average Price

£45,466 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

30.3%

Price Spread

25.9%

30-Day Price Trend

+0.6%

30-Day Supply Change

+7.5%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$16,565/ct

10th Percentile

$12,739

Median

$16,565

90th Percentile

$21,743

Score Distribution

619 diamonds scored across 4 quality tiers

Excellent

73 (11.8%)

Very Good

135 (21.8%)

Good

133 (21.5%)

Average

278 (44.9%)

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Consider Instead

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

D SI2SI2 inclusions are not visible without magnification

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Lab-Grown D SI1Same 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