How much does a 0.75 to 0.99ct E I1 natural round diamond cost?

As of October 2026, 0.75 to 0.99ct E I1 natural round diamonds typically cost £646 GBP to £2,137 GBP, with a median price of £1,107 GBP. There are currently 126 diamonds matching this specification available across retailers.

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

About 27% of these diamonds are available at multiple retailers, with an average price spread of 62%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct E I1 Natural Round

Quick answer

As of October 2026, there are 126 natural round diamonds with E colour and I1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run £646 GBP to £2,137 GBP, with a median of £1,107 GBP. At least 29 retailers stock this exact specification, and 27% of the stones appear at more than one of them, with an average price spread of 62%. Half of all listings fall between £993 GBP and £1,785 GBP per carat. Over the last 30 days the median price moved -6.5% and the number of listings moved +8.0%.

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. Round natural stones in the index: 2,248 USD per carat, +7.6% 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

126

Lowest Price

£243 GBP

Highest Price

£3,591 GBP

Average Price

£1,276 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

27.0%

Price Spread

61.7%

30-Day Price Trend

-6.5%

30-Day Supply Change

+8.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,704/ct

10th Percentile

$1,088

Median

$1,704

90th Percentile

$3,353

Score Distribution

376 diamonds scored across 4 quality tiers

Excellent

61 (16.2%)

Very Good

66 (17.6%)

Good

64 (17.0%)

Average

185 (49.2%)

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F I1F colour is visually identical to E to the naked eye

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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