How much does a 0.75 to 0.99ct I I1 natural oval diamond cost?

As of October 2026, 0.75 to 0.99ct I I1 natural oval diamonds typically cost £729 GBP to £1,328 GBP, with a median price of £983 GBP. There are currently 24 diamonds matching this specification available across retailers.

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

About 13% 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.

0.75 to 0.99ct I I1 Natural Oval

Quick answer

As of October 2026, there are 24 natural oval diamonds with I colour and I1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run £729 GBP to £1,328 GBP, with a median of £983 GBP. At least 24 retailers stock this exact specification, and 13% of the stones appear at more than one of them, with an average price spread of 33%. Half of all listings fall between £993 GBP and £1,379 GBP per carat. The same specification in lab grown form lists at a median of about £324 GBP per carat. Over the last 30 days the median price moved +0.1% and the number of listings moved +3.0%.

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

Lowest Price

£441 GBP

Highest Price

£2,588 GBP

Average Price

£1,014 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

13.0%

Price Spread

33.1%

30-Day Price Trend

+0.1%

30-Day Supply Change

+3.0%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,552/ct

10th Percentile

$1,078

Median

$1,552

90th Percentile

$2,367

Score Distribution

106 diamonds scored across 4 quality tiers

Excellent

4 (3.8%)

Very Good

13 (12.3%)

Good

4 (3.8%)

Average

85 (80.2%)

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Consider Instead

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

J I1J colour is visually identical to I to the naked eye

Save 16%

Lab-Grown I I1Same 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