How much does a 0.75 to 0.99ct E SI2 natural heart diamond cost?

As of October 2026, 0.75 to 0.99ct E SI2 natural heart diamonds typically cost £724 GBP to £2,000 GBP, with a median price of £1,066 GBP. There are currently 88 diamonds matching this specification available across retailers.

Where can I find the best price on a E SI2 heart diamond?

About 34% of these diamonds are available at multiple retailers, with an average price spread of 59%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct E SI2 Natural Heart

Quick answer

As of October 2026, there are 88 natural heart diamonds with E colour and SI2 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run £724 GBP to £2,000 GBP, with a median of £1,066 GBP. At least 53 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 59%. Half of all listings fall between £1,083 GBP and £1,865 GBP per carat. The same specification in lab grown form lists at a median of about £242 GBP per carat. Over the last 30 days the median price moved -2.5% and the number of listings moved +7.7%.

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. Heart natural stones in the index: 2,374 USD per carat, +9.8% 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

£420 GBP

Highest Price

£4,513 GBP

Average Price

£1,262 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

33.7%

Price Spread

59.0%

30-Day Price Trend

-2.5%

30-Day Supply Change

+7.7%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,767/ct

10th Percentile

$1,211

Median

$1,767

90th Percentile

$3,727

Score Distribution

274 diamonds scored across 4 quality tiers

Excellent

59 (21.5%)

Very Good

36 (13.1%)

Good

64 (23.4%)

Average

115 (42.0%)

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Consider Instead

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

F SI2F colour is visually identical to E to the naked eye

Save 13%

Lab-Grown E SI2Same specifications, lab-grown origin

Save 82%

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