How much does a 1.00 to 1.49ct E SI2 natural heart diamond cost?

As of September 2026, 1.00 to 1.49ct E SI2 natural heart diamonds typically cost £1,152 GBP to £3,885 GBP, with a median price of £1,649 GBP. There are currently 644 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct E SI2 Natural Heart

Quick answer

As of September 2026, there are 644 natural heart diamonds with E colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,152 GBP to £3,885 GBP, with a median of £1,649 GBP. At least 46 retailers stock this exact specification. Half of all listings fall between £1,427 GBP and £2,079 GBP per carat. The same specification in lab grown form lists at a median of about £394 GBP per carat.

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. Heart natural stones in the index: 2,261 USD per carat, +1.7% 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

644

Lowest Price

£311 GBP

Highest Price

£14,806 GBP

Average Price

£2,179 GBP

Market Intelligence

Retailers Selling

Price Spread

39.1%

Price Range

Price per carat distribution across retailers

$2,118/ct

10th Percentile

$1,560

Median

$2,118

90th Percentile

$3,612

Score Distribution

644 diamonds scored across 4 quality tiers

Excellent

109 (16.9%)

Very Good

195 (30.3%)

Good

137 (21.3%)

Average

203 (31.5%)

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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 11%

Lab-Grown E SI2Same specifications, lab-grown origin

Save 76%

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