How much does a 5.00ct+ I I1 natural oval diamond cost?

As of September 2026, 5.00ct+ I I1 natural oval diamonds typically cost £10,195 GBP to £46,708 GBP, with a median price of £23,047 GBP. There are currently 15 diamonds matching this specification available across retailers.

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

About 38% 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.

5.00ct+ I I1 Natural Oval

Quick answer

As of September 2026, there are 15 natural oval diamonds with I colour and I1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £10,195 GBP to £46,708 GBP, with a median of £23,047 GBP. At least 7 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 33%. Half of all listings fall between £2,485 GBP and £3,516 GBP per carat. Over the last 30 days the median price moved -61.3% and the number of listings moved -62.0%.

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

Lowest Price

£8,450 GBP

Highest Price

£110,576 GBP

Average Price

£26,989 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

38.5%

Price Spread

33.3%

30-Day Price Trend

-61.3%

30-Day Supply Change

-62.0%

Volatility (30d)

0.16

Price Range

Price per carat distribution across retailers

$4,176/ct

10th Percentile

$2,486

Median

$4,176

90th Percentile

$5,501

Score Distribution

15 diamonds scored across 3 quality tiers

Very Good

6 (40.0%)

Good

4 (26.7%)

Average

5 (33.3%)

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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