How much does a 0.50 to 0.74ct E SI2 lab grown heart diamond cost?

As of November 2026, 0.50 to 0.74ct E SI2 lab grown heart diamonds typically cost £70 GBP to £410 GBP, with a median price of £104 GBP. There are currently 1 diamonds matching this specification available across retailers.

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

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0.50 to 0.74ct E SI2 Lab Grown Heart

Quick answer

As of November 2026, there are 1 lab grown heart diamonds with E colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run £70 GBP to £410 GBP, with a median of £104 GBP. The same specification in natural form lists at a median of about £950 GBP per carat.

Three of the best scored stones at this specification right now:

0.50ct Heart E SI2, IGI, grade C, from £487 GBP

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 lab grown stones in the index: 421 USD per carat, -1.8% 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: November 2026

Available

Lowest Price

£61 GBP

Highest Price

£487 GBP

Average Price

£217 GBP

Score Distribution

3 diamonds scored across 2 quality tiers

Very Good

1 (33.3%)

Average

2 (66.7%)

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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