How much does a 1.00 to 1.49ct D SI2 natural oval diamond cost?

As of October 2026, 1.00 to 1.49ct D SI2 natural oval diamonds typically cost £1,556 GBP to £4,394 GBP, with a median price of £2,488 GBP. There are currently 980 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 51%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct D SI2 Natural Oval

Quick answer

As of October 2026, there are 980 natural oval diamonds with D colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,556 GBP to £4,394 GBP, with a median of £2,488 GBP. At least 61 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 51%. Half of all listings fall between £1,797 GBP and £2,913 GBP per carat. The same specification in lab grown form lists at a median of about £259 GBP per carat. Over the last 30 days the median price moved -0.0% and the number of listings moved +1.0%.

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. 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

980

Lowest Price

£888 GBP

Highest Price

£9,592 GBP

Average Price

£2,786 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

36.0%

Price Spread

51.0%

30-Day Price Trend

-0.0%

30-Day Supply Change

+1.0%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,908/ct

10th Percentile

$2,004

Median

$2,908

90th Percentile

$5,087

Score Distribution

2.8K diamonds scored across 4 quality tiers

Excellent

672 (23.9%)

Very Good

774 (27.5%)

Good

466 (16.5%)

Average

904 (32.1%)

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Consider Instead

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Lab-Grown D 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