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

As of September 2026, 1.00 to 1.49ct D SI2 natural oval diamonds typically cost £1,564 GBP to £3,620 GBP, with a median price of £2,262 GBP. There are currently 2,803 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct D SI2 Natural Oval

Quick answer

As of September 2026, there are 2,803 natural oval diamonds with D colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,564 GBP to £3,620 GBP, with a median of £2,262 GBP. At least 55 retailers stock this exact specification. Half of all listings fall between £1,744 GBP and £2,438 GBP per carat. The same specification in lab grown form lists at a median of about £1,113 GBP per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Oval natural stones in the index: 2,380 USD per carat, -9.6% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

2,803

Lowest Price

£965 GBP

Highest Price

£8,952 GBP

Average Price

£2,458 GBP

Market Intelligence

Retailers Selling

Price Spread

33.8%

Price Range

Price per carat distribution across retailers

$2,769/ct

10th Percentile

$1,996

Median

$2,769

90th Percentile

$3,970

Score Distribution

2.8K diamonds scored across 4 quality tiers

Excellent

519 (18.5%)

Very Good

913 (32.6%)

Good

671 (24.0%)

Average

698 (24.9%)

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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