How much does a 1.00 to 1.49ct D I1 lab grown oval diamond cost?

As of September 2026, 1.00 to 1.49ct D I1 lab grown oval diamonds typically cost £3,339 GBP to £5,508 GBP, with a median price of £3,696 GBP. There are currently 5 diamonds matching this specification available across retailers.

Where can I find the best price on a D I1 oval diamond?

About 12% of these diamonds are available at multiple retailers, with an average price spread of 228%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct D I1 Lab Grown Oval

Quick answer

As of September 2026, there are 5 lab grown oval diamonds with D colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £3,339 GBP to £5,508 GBP, with a median of £3,696 GBP. At least 7 retailers stock this exact specification, and 12% of the stones appear at more than one of them, with an average price spread of 228%. Half of all listings fall between £343 GBP and £3,057 GBP per carat. The same specification in natural form lists at a median of about £2,235 GBP per carat. Over the last 30 days the median price moved -1.7% and the number of listings moved -18.0%.

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 lab grown stones in the index: 487 USD per carat, -11.2% 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

Lowest Price

£3,231 GBP

Highest Price

£6,184 GBP

Average Price

£4,221 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

11.8%

Price Spread

227.6%

30-Day Price Trend

-1.7%

30-Day Supply Change

-18.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,609/ct

10th Percentile

$338

Median

$1,609

90th Percentile

$4,994

Score Distribution

5 diamonds scored across 1 quality tiers

Average

5 (100.0%)

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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